Question

In a family of 3 children , the probability of having at least one boy is ?

Answer 1

Given :

A family of 3 children

To Find :

The probability of having at least one boy is ?

Solution:

Probability of boy = $\frac{1}{2}$

Probability of girl = $\frac{1}{2}$

We are supposed to find In a family of 3 children , the probability of having at least one boy

Probability of having at least one boy = 1- Probability of having no boy

Probability of having at least one boy = 1- P(No boy)

Probability of having at least one boy = 1- P(All girls)

Probability of having at least one boy =$1- (\frac{1}{2} \times \frac{1}{2} \times \frac{1}{2})$

Probability of having at least one boy =$1- (\frac{1}{8})$

Probability of having at least one boy =$\frac{1}{7}$

Hence the probability of having at least one boy is 1/7

Answer 2

Answer:

hope it helps!