Permutation and CombinationHard
Question
Number of ways in which 9 different toys be distributed among 4 children belonging to different age groups in such a way that distribution among the 3 elder children is even and the youngest one is to receive one toy more, is:
Options
A.
B.
C. 
D.none
Solution
Here first three children receive 2 each and younger receives 3 toys
then total 3 toys
then total number of distribution is
9C2 . 7C2 . 5C2 . 3C2
then total 3 toys
then total number of distribution is
9C2 . 7C2 . 5C2 . 3C2
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