Q.
Three groups of children contain 3 girls and 1 boy, 2 girls and 2 boys, 1 girl and 3 boys respectively. One child is selected at random from each group. The chance that the selected group comprises of 1 girl and 2 boys is
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a
1332
b
1632
c
1932
d
312
answer is A.
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Detailed Solution
(G B B)+(B G B)+(B B G) P(E)=34.24.34+14.24.34+14.24.14=1332
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