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AP EAMCET202120 Aug 2021Evening ShiftMathematicsPermutation and CombinationActual

A set contains 11 elements. The number of subsets of the set which contain at most 5 elements is

Options

  1. AC 0 12 + C 2 12 + C 4 12
  2. BC 0 11 + C 1 11 + C 2 11 + C 3 11 + C 4 11 + C 5 11
  3. CC 0 11 + C 1 11 + C 2 11 + c 3 11 + C 4 11 + C 5 11
  4. DC 0 11 + C 1 11 + C 2 11 + C 3 11

Correct answer

B. C 0 11 + C 1 11 + C 2 11 + C 3 11 + C 4 11 + C 5 11

Step-by-step solution

GIven, N=11 elements At most=5 elements So, total element= C 0 11 + C 1 11 + C 2 11 + C 3 11 + C 4 11 + C 5 11

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