Answer:
And we know that each time that we win we recieve $1 and each time we loss we need to pay $1, so then the expected value would be given by:
And the variance is defined as:
Step-by-step explanation:
For this case we know that we can win if we select 2 balls of the same color, so we can find the probability of win like this:
So then the probability of no win would be given by the complement:
We can define the random variable X who represent the amount of money that we can win.
And we can use the definition of expected value given by:
And we know that each time that we win we recieve $1 and each time we loss we need to pay $1, so then the expected value would be given by:
We can calculate the second monet like this:
And the variance is defined as:
All you do is make 3/4 into 12/16 and 12 is your answer.
The length of the longest side of the building would be 330 feet.
Answer:
2 chaperones
Step-by-step explanation:
We will use the math operation division to find the answer. Division takes a total and divides it into equal amounts. We have a total of 72 students and need equal amounts in to each of the 9 groups.
72/9=8 students per group
Since each 4 students need a chaperone, then each group of 8 students needs 2 chaperones. 8/4=2.