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Question

Any teacher can be included in the committee?
  1. 924
  2. 844
  3. None of these
  4. 626
  5. 718


Solution

The correct option is A 924

When any teacher can be included in the committee, then number of ways
=12C6                    (by short trick 1)
=12!(126)!×6!=12×11×10×9×8×7×6!6×5×4×3×2×6!=11×2×3×2×7
= 924

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