Question

Ignoring twins and other multiple births, assume babies born at a hospital are

independent events with the probability that a baby is a boy and the probability that a

baby is a girl both equal to 0.5. Define event B = {at least one of the next two babies is

a boy}. What is the probability of the complement of event B?

A) 0.125

B) 0.250

C) 0.375

D) 0.500

53. Ignoring twins and other multiple births, assume babies born at a hospital are

independent events with the probability that a baby is a boy and the probability that a

baby is a girl both equal to 0.5. What is the probability that at least one of the next

three babies is a boy?

A) 0.125

B) 0.333

C) 0.750

D) 0.875

Answer 1

Probability of the complement of event B:

The probability of the complement of event B is computed as follows:

The probability of the complement of event B is B) 0.25.

Probability that at least one of the next three babies is a boy:

The probability that at least one of the next three babies is a boy is computed as follows:

The probability that at least one of the next three babies is a boy is D) 0.875.