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gayaneshka [121]
2 years ago
9

I Need Help , Help Me Out Please !!!!

Mathematics
1 answer:
Dafna11 [192]2 years ago
6 0

very positive about these results

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The game of American roulette involves spinning a wheel with 38 slots: 18 red, 18 black, and 2 green. A ball is spun onto the wh
solong [7]

Answer:

a)- \frac{1}{19}

b) SD(x) =  0.9986

Step-by-step explanation:

Given data:

Number of slots 38

slots for red ball 18

slots for black = 18

slots for green 2

outcomes       Red      Black or Green

Profit                  1                 -1

P(X)                   18/38       20/38

Expected value of wining,  

E(x) = 1. \frac{18}{38} + (-1) \frac{20}{38} = - \frac{2}{38} = - \frac{1}{19}

B) Standard deviation of winning SD(x)

SD(x) = \sqrt{(1- (-\frac{1}{19})^2 .\frac{18}{38} + (1- (-\frac{1}{19})^2 .\frac{20}{38}}

SD(x) = \sqrt{\frac{360}{361}

SD(x) =  0.9986

3 0
3 years ago
Kit charges customers an initial fee plus a certain amount per hour to walk their pets. The table below shows the amount of mone
Luda [366]

Answer:

The answer would be 7.5

Step-by-step explanation:

This is due to if there were to be a chart it would start at 15 then continue by 7.5 which would then lead to 1 hour which is 22.5 min additionally other people are not answering this because you did not give all the information such as the chart etc and the answers unlike me i have the toolds and the questions.

8 0
3 years ago
Kyle volunteered 5.5 hours at the library this week. He needs to volunteer a total of 12 hours. Which equation can be used to fi
CaHeK987 [17]
12-5.5=h hope it helps
5 0
3 years ago
PLEASE PLEASE HELP ME!!!
leonid [27]
I tried to show all work.

8 0
2 years ago
Read 2 more answers
What are the partial products of 8*1,126?
Genrish500 [490]

Answer:

The sides of the rectangle can then be divided into parts to reveal partial products that make up the total product. This helps students develop the flexibility and conceptual understanding required to build fluency with basic facts and strategies for multiplication of larger numbers.

Step-by-step explanation:

8 0
2 years ago
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