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.Solution
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
More Permutation and combination Questions
2807, 1400, 697, 346, 171, 84, 41, ?
What will come in place of the question mark (?) in the following series?
68, 76, 61, 85, ?, 98
56, 27, 14.5, 6.25, ?, 1.0625
42, 48, 60, 84, 132, ?
5 6 14 45 ? 925
...47, 72, 122, ?, 297, 422
25 54 ? 228 460 924
...4 9 28 99 ? 2105 12660
...64, 32, 48, 120, 420, ?
Find the missing character.
