AP Statistics Chapter 5 B

Event A occurs with probability 0.8. The conditional probability that event B occurs, give that A occurs, is 0.5. The probability that both A and B occur

is 0.4.

What is the probability that the student chosen is left-handed or prefers to communicate with friends in person?

0.53

If you know the person that has been randomly selected is left-handed, what is the probability that they prefer to communicate with friends in person?

0.382

Event A occurs with probability 0.3, and event B occurs with probability 0.4. If A and B are independent, we may conclude that

all of the above

A basketball player makes 2/3 of his free throws. To simulate a single free throw, which of the following assignments of digits to making a free throw are appropriate?

I, II, III

Ignoring twins and other multiple births, assume that babies born at a hospital are independent random events with the probability that a baby is a boy and the probability that a baby is a girl both equal to 0.5. The probability that at least one of the next three babies is a boy is

0.875.

Given that a student who ate breakfast is selected, what is the probability that he is male?

0.64

Find P(B/F) and write in words what this expression represents.

0.30; The probability the student ate breakfast, given she is female.

Event A occurs with probability 0.3. If event A and B are mutually exclusive (disjoint), then

P(B) less than or equal to 0.7.

Suppose that A and B are independent events with P(A)= 0.2 and P(B) = 0.4. P(A or B^c) is

0.12.