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m25 q.3

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Intern
Joined: 13 Aug 2013
Posts: 23

Kudos [?]: 6 [0], given: 1

Re: m25 q.3 [#permalink]

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08 Jan 2014, 21:07
Total selections : 10c3 =120. cases when none of the professor is included = 6c3=20. hence favourable cases = 120-20=100

Kudos [?]: 6 [0], given: 1

Manager
Joined: 20 Oct 2013
Posts: 75

Kudos [?]: 12 [0], given: 15

Location: United States
Concentration: General Management, Real Estate
Re: m25 q.3 [#permalink]

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20 Apr 2014, 03:27
how many ways to form a committee w/o any professor

-> all members are students: choose 3 out of 6 -> 20 ways
Form a committee w/o restriction -> choose 3 out of 10 -> 120 ways
=> at least 1 prof = 100 ways

Kudos [?]: 12 [0], given: 15

Re: m25 q.3   [#permalink] 20 Apr 2014, 03:27

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m25 q.3

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