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rajat agarwal Grade: 11
        Q. Three ladies have each brought a child for admission to a school. The head of the school wishes to

interview the six people one by one, taking care that no child is interviewed before its mother. The
number of ways of doing this is
(A) 6 (B) 36 (C) 72 (D)90
7 years ago

Answers : (2)

Ramesh V
70 Points
										

Let tha people be L1S1L2S2L3S3


each son comes after his mother


taking son,mother as set , there are 3 sets whihc can be arranged in 3! ways


answer : 6 ways


--


regards


Ramesh

7 years ago
rajat agarwal
23 Points
										

but answer is 90 ways

7 years ago
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