Question

In a two children family, find the probability that there is at least one girl in a family.​

Answer 1

Answer:

Step-by-step explanation:

There are two children in the family.

That means the Total Number of Possible matches are:

1) Girl and Girl

2) Boy and Boy

3) Boy and Girl

Number of outcomes where there is at least 1 girl is is the 1st and 3rd match. That is when there is 2 girls or 1 boy and 1 girl.

Now Probability = Favorable outcomes/ Total Number of Outcomes

Favorable Outcomes = 2 ( That is 2 girls or 1 boy 1 girl)

Total Outcomes = 3 ( That is 2 girls or 2 boys or 1 boy 1 girl)

So, Probability = 2/3

Common mistakes that are made is considering 1 Boy 1 girl as 1 outcome and 1 girl 1 boy as another outcome whereas both mean the same thing.

Hope it helps...

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