Question
From a group of 8 engineers and 4 doctors, a committee of 6
members is to be formed. Find the number of ways to form the committee such that at least 5 engineers are selected.Solution
Case I: 5 engineers and 1 doctor:
8 C 5 × 4 C 1 = 56 × 4 = 224
Case II: 6 engineers and 0 doctors:
8 C 6 × 4 C 0 = 28 × 1 = 28
Total = 224 + 28 = 252 ways
4, 12, 36, 108, ?, 396
3, 5, 12, 38, 154, ?
94Â Â Â 115Â Â Â 138Â Â Â 163Â Â Â Â 190Â Â Â Â ?
What will come in place of the question mark (?) in the following series?
225, 227, 233, 245, 265, ?
- What will come in place of (?), in the given number series.
2, 5, 10, 17, ?, 37 84, 63, ?, 283.5, 1701
Find the missing number in the given number series.
1, 2, 3, 6, 11, 20, ?126 56 ? 12 10 2
...What value should come in the place of (?) in the following number series?
180, 194, ?, 264, 320, 390
63 131 267 ? 1083 2171