Question

1.For kids waiting in the lunch line at school, the probability of eating a hamburger is .60. The probability drinking chocolate milk is .75. The probability of having both a hamburger and a chocolate milk is .45. Getting a hamburger and getting chocolate milk are examples of:

2.An experiment consists of three steps. In the first step, you need to select one out of 7 possibilities. In the second step, you need to select 3 out of 8 possibilities (the order that you select them in doesn't matter). In the third step, you need to select 2 out of 6 possibilities (the order does matter for this third step!) How many total outcomes are possible?

3.Ship collisions in the Houston Ship Channel are rare. Suppose the mean number of collisions is 2.4 for any eight-month period of time. What is the probability of having at least one collision in a two-month period?

Answer 1

1)

A -event of eating a hamburger

B - event of drinking chocolate milk

P(A) = 0.60

P(B) = 0.75

P(A and B) = 0.45

since

P(A and B) = P(A) P(B)

A and B are independent events

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