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In three groups of children there are 3 girls and 1 boy, 2 girls, 2 boys, 1 girl and 3 boys.

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In three groups of children there are 3 girls and 1 boy, 2 girls, 2 boys, 1 girl and 3 boys. A child is randomly selected from each group. Find the probability that selected children are 1 girl and 2 boys.

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GI , GII and GIII are three groups of students. 

Then 1 girl and 2 boys can be selected in following ways.

Here Girls and Boys are represented by G1, G2, G3 and B1, B2, B3 resp. 

Hence required probability is

= P (1 Girl and 2 boys are relected)

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