A family has two children. What is the probability that both the children are boys given that at-least one of them is a boy?

Explanation

To solve the problem, we need to find the probability that both children in a family are boys given that at least one of them is a boy. We will denote boys as 'B' and girls as 'g'.

### Step-by-step Solution:

1. **Identify Possible Outcomes**:
For a family with two children, the possible combinations of genders are:
- BB (both boys)
- Bg (first child is a boy, second is a girl)
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