Question
In how ways can the selection be made so that a
particular member is always excluded?   There are 5 members in a delegation which is to be sent abroad. The total no. of members is 11.ÂSolution
As 1 person is always excluded, members are to be chosen out of 10 persons. ∴ Reqd. no. of ways = 10C_5 =  (10 ×  9 × 8 × 7 × 6)/(5 × 4 × 3 × 2) =  252
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