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Q.

The number of ways in which a committee of 3 women and 4 men be chosen from 8 women and 7 men if Mr. X refuses to serve on the committee if Mr. Y is a member of the committee is

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a

420

b

840

c

1540

d

1400

answer is D.

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Detailed Solution

Women can be chosen in C3 8 ways and men in 7C4−5C2

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