Mathematics High School

Marleny is creating a game of chance for her family. She has 5 different colored marbles in a bag: blue, red, yellow, white, and black. She decided that blue is the winning color. If a player chooses any other color, they lose 2 points. How many points should the blue marble be worth for the game to be fair?
4
6
8
10

Answers

Answer 1

Answer:

Step-by-step explanation:

Got it right on brainly

Answer 2

The blue marble should be worth 8 points , Option C is the answer.

What is Probability ?

Probability is the likeliness of an event to happen.

Let the random variable is x ,

probability mass function is f(x) = P(X = x)

then The expectation of a random variable is determined by

E(x) = ∑(i =1 to n) ( [tex]\rm x _i *f(x_i)[/tex] )

If the game has to be fair , the number of points that one can loose should be equal to the number of points one can gain.

Probability of getting any color marble = 1/5 = 0.2

Let x be the total points scored in a game

and b be the number of points for blue coloured marble

Probability of choosing non-blue marble = 4/5 (points =-2)

Probability of choosing blue marble = 1/5 (points = b)

E(x) = -2 * (4*5) + b* (1/5)

The expectation will be zero as the total points balance out

0 = -8/5 + b/5

b = 8

Therefore the blue marble should be worth 8 points , Option C is the answer.

To know more about Probability

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Related Questions

Sparky has a monthly cell phone plan that has a fixed charge of $15 per month plus $0.05 per text message. Sparky wants to spend no more than $50 per month on his cell phone. Write an inequality that represents the number of test messages, x, that Sparky can use in a month. PLEASE HELP!!!

Answers

Answer:

15 + 0.05x ≤ 50

Step-by-step explanation:

The cost needs to be less than or equal to 50. Thus, the equation would be

15 + 0.05x ≤ 50

What is x on these triangles?

Answers

Answer:

both of them have already been solved.

Which value of h makes the equation below true?
5x + 8 = 28

Answers

Answer:

Step-by-step explanation:

So, the point of this is to make x the only thing on one side, so we can see what x is!

Okay so first subtract 8 on both sides...

5x= 25

Now we need to divide on both sides!

That equals...

x=5

So now we know that x=5!

Hope this helped!! :D

If you have any questions whatsover, make sure to comment!

A circle has a center at A (-3,4) and radius of 4 units.
What is the equation of the circle?

Answers

(x+3)²+(y-4)² = 25

I am pretty sure this is it

I need help on this one....

Answers

Answer:

Step-by-step explanation:

Brainliest???

Step-by-step explanation:

Option B is the correct answer

When hypotenuse is given 4 cm, base is 3 cm and
perpendicular is 2 cm. Find out whether it is rights angled
triangle or not.

Answers

Answer:

It's not Right Angled Triangle.

Step-by-step explanation:

By using Pythagoras theorem.

H^2=P^2+B^2

Here p=2,b=3,and h=4.

4^2=3^2+2^2

16=9+4

16 is not equal to 13.

Proved.

this is a math test and i really need help. ill give brainliest

Answers

Answer:

Oh boy, here we go:

17) 20

18) 135

19) 142

20) 14

21) No

10) B (I believe)

11) A

12) A

13) A

14) A

15) A (I don't know why these are all A...)

16) C (Yay, it's not A)

Step-by-step explanation:

I think you need this ASAP and don't want to wait for me to type this all out...

Answer:

17.

45 + 5x + 35 = 180

5x + 80 = 180

x = 20

18.

5x + 35

5(20) + 35 = 135 degrees

19. Choice D. 142

20. Choice C

5x - 10 = 60

x = 14

21. Yes

10. Choice B (-3, -5)

11. Choice A (-3, 2)

12. Choice B, reflection across the y-axis

13. Choice A, y-axis

14. Choice A

15. Choice A

16. Choice A

I need help with this one asw

Answers

Answer:

a. 5

Step-by-step explanation:

9 - 4 = 5

Answer:

the distance between (-3, 9) and (-3, -4) is 13

(the difference between -4 and 9 is 13)

expression
1. Use the Distributive Property to write -4(7 - 1) as an equivalent expression
What is the value of the expression?

Answers

The value of the expression is -24

This is because you distribute the -4 to both of the values in the parenthesis like this:
-4(7) + -4(-1)
This can be simplified to:
-28 + 4
Which equals -24
Hope this helps!

What is the circumference of one of the blue circles? ****Remember, circumference is pi x diameter. Since it is a half circle you will have to divide by 2

.

Answers

Answer:

68.2yd

Step-by-step explanation:

40xpi is 125.66370614. 125.66370614/2 is 68.2

Write this expression in simplest form. 256h^10

Answers

Answer:

I believe thats the furthest

Step-by-step explanation:

i think it’s already simplified, but 256=16^2 if you want to do anything w it

If 10 litres of petrol cost 17.10$, calculate the cost of 4 litres of petrol?

Answers

Answer:

It will cost $6.84 for 4 litres of petrol

Step-by-step explanation:

$17.10÷10=$1.71.

$1.71×4=$6.84

Samantha needs 9 feet of fencing to make repairs from a storm. If the hardware store sells fencing only in yards, how much
fencing does Samantha need?
A. 6 yards
B. 27 yards
C. 3 yards
D.108 yards

Answers

It's C. because 3 yards is 9 feet

c. 3 yards is 9 feet

HELP, what’s the perimeter of the rectangle

Answers

Answer:

to find the perimeter of a rectangle , just add up all the values of the sides.

hope it helps :)

A computer software retailer used a markup rate of 30%. Find the selling price of a computer
game that cost the retailer $35.

Answers

Answer:

30/100×35, =27/2, that is the answer

Calculate the total area of the figure below:

24 cm2

4 cm2

18 cm2

16 cm2

Answers

Answer:

[tex] 4 \:cm^2 [/tex]

Step-by-step explanation:

Total area of the figure

[tex] = \frac{1}{2} bh \\ \\ = \frac{1}{2} \times 4 \times 2 \\ \\ = 4 \: {cm}^{2} [/tex]

Which shows a pair of similar circles ?

Answers

Answer:

d) I, II and III.

Step-by-step explanation:

Two circles are similar when the two circles have different or equal radii. In case I, we have similar circles that are congruent and non-concentric, since their radii are equal. In case II, we find two similar circles which are secant to each other. Lastly, the case III represents two similar circles which are concentric.

Therefore, I, II and III show pairs of similar circles.

please help!! I forget how to do these :[

Answers

Answer:

1/4

Step-by-step explanation:

there are 2 multiples of 3, 3 and 6

2/8=1/4

Answer: 1/4 chance (second option on the screen)

Step-by-step explanation:

dw probability is confusing to a lot of ppl

so if you count the sections theres 8 in all

to see the probability we must find how many times we will get a positive outcome, or what we want (the multiple of 3)

lets see how many multiples of 3 there are

theres 3 and 6

thats two out of the eight possible outcomes at any moment u spin the spinner

so thats an 2/8 chance

you can simplify that fraction to a 1/4 chance, so its the second option on your screen

Select the correct answer from each drop-down menu.
How many solutions does each polynomial have?

Equation Number of
Solutions

Select the correct answer from each drop-down menu. How many solutions does each polynomial have? Equation Number of Solutions

Answers

Answer:1,3,and 5

Step-by-step explanation:

Which is better value for money: 2 pizzas for
£12 or 4 pizzas for £28?

Answers

For the first one, each pizza is $6

For the second one, each pizza is $7

The first one is the answer

Answer:

2 pizzas for £12.

Step-by-step explanation:

[tex]\frac{2}{12}: \frac{1}{y}[/tex]

y · 2 = 12 · 1

2y = 12

2y ÷ 2 = 12 ÷ 2

y = 6

£6 for 1 at the price of 2 for £12.

[tex]\frac{4}{28}: \frac{1}{y}[/tex]

y · 4 = 28 · 1

4y = 28

4y ÷ 4 = 28 ÷ 4

y = 7

£7 for 1 at the price of 4 for £28.

f(x)=-2x^2-4x+6 in factored form

Answers

Answer:

= (X-1) (-2X- 6)

Step-by-step explanation:

17. In the 1600s, a blacksmith could make a living by hand-forging horseshoes and nails. A diligent blacksmith could
make one horseshoe in 12 minutes and a nail in 1 minute. In the 1600s, it would take the blacksmith 210
minutes to complete a particular job. With advances in technology, the blacksmith was able to make a
horseshoe in 9 minutes and a nail in 40 seconds, and could complete the same job in 155 minutes. In the
equations below, h represents the number of horseshoes in the job, and n represents the number of nails in
the job.
12h + n = 210
2n
9h +
= 155
How many nails were in the job the blacksmith completed?

Answers

Answer: It would be 30

Step-by-step explanation:

which does NOT represent a function? ill give brainliest

Answers

Answer:

Step-by-step explanation:

C is not a function because 5 has two y values

Answer:

Option C is NOT a function.

Step-by-step explanation:

For these functions we will use subtraction as our example. With option A the pattern is: -8, -7, -6, -5. Therefore option A is a function. With option C the pattern is: 3, 3, 3, 2. Therefore this is not a function. With option B the pattern is 0, 0, 0, 0. Therefore this is a function. With option D the pattern is: -6, -2, 2, 6. Therefore this is a function.

This question can be done multiple ways, but this is just one of them.

Solve for x. Enter the solutions from least to greatest.
(x - 3)^2 - 81 = 0
lesser x=
greater x =

Answers

Answer:

lesser x = -6

greater x = 12

Step-by-step explanation:

(x - 3)^2 - 81 = 0

(x - 3)^2 = 81

x - 3 = +/- 9

x - 3 = 9 or x - 3 = -9

x = 12 or x = -6

Can someone help me with this trig ratio question please?

Answers

Answer:

sin D = 118/119

Step-by-step explanation:

sin = opposite side/hypotenuse

sin D = 118/119

2,6,18,54,162,486,1458.. find the term in position 12 (include all the steps, using the formula)

Answers

Answer:

Gl=2 r=3 so you can simply answer it gl r^11

2× 3^11

I I need help on this one fast ???

Answers

Answer:

True

Step-by-step explanation:

Answer:

i think its true but u can also copy and paste some of it like this: Is the energy transferred from a firepit to my cold hands transferred through the process called radiation?

Step-by-step explanation:

what is the answer??

Answers

Answer:

Step-by-step explanation:

The very bottom one I am sure

PLEASE HELP! NO LINKS!!

Answers

Answer:

???? ????????????????????

Answer:

64°

Step-by-step explanation:

You can measure an arc in degrees just like you measure an angle

A parallelogram has four congruent sides, and one of the angles measures 37°. What is the figure?

rhombus
square
trapezoid
rectangle

Answers

Answer:

Should be a rhombus since it has four congruent sides.

Step-by-step explanation:

hope this helps and is right. p.s i really need brainliest :)

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