Question

A married couple agreed to continue bearing a new child until they get two boys, but not more than 4 children. assuming that each time that a child is born, the probability that it is a boy is 0.5, independent from all other times. find the probability that the couple has at least two girls.

Answer 1

The probability that this couple has at least two girs is 0.5

This couple have an agreement to keep having children till they have two boys but they plan on not having more than 4 children.

Whenever they have a new child, there is a 0.5 chance that the baby is a boy.

The probability would be 1 - P'

P' = 0.5³ + 0.5³ + 0.5² = 0.5

1- 0.5 = 0.5

The probability that the couple has at least two girls is given as 0.5

What is probability?

This is a topic in mathematics and statistics that is used to refer to the chances of an event occuring.

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