Sonika Jain Asked a Question
October 12, 2020 8:18 pmpts 30 pts
11. We are given a class consisting of 4 boys and4 girls. A committee that consists of a President, a Vice - President and a Secretary is to be chosen among the 8 students of the class. Let a' denote the number of ways of choosing the committee in such a way that the committee has at least one boy and at least one girl. Let b denote the number of ways of choosing the committee in such a way that the number of girls is greater than or equal to that of the boys. Then (CSIR UGC NET JUNE-2014) 1. a=288 3 a-144 2. b=168 4. b-192
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  • Satyam Singh
    in how many ways you can arrange a boy and 2 girls say boy B and girls G1 and G2
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  • Satyam Singh
    in how many ways you can arrange a boy and 2 girls
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  • Satyam Singh thankyou
    the value for a is 288 ways and for b the value is 168 so b option is correct I answered the question in most simpler way hope it will help you
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    Sonika Jain
    why 3! is require here we dont have anywhere mentioned that position of persons are to be c siderwd
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