Out of 7 men and 4 ladies committee of 5 is to be formed. In how many ways can this be done so as to include at least 3 ladies? Select one: a. 191 b. 91 c. 121 d. 84
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We can choose 3 ladies out of 4 in ${4 \choose 3} = 4$ ways. Then, we need to choose the remaining members from the 7 men and 1 remaining lady. We can choose any combination of these 8 members in $2^8$ ways (since each member can either be included or not included Show more…
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