Engineering Board Exam Reviewer · Permutations · medium

How many ways can 4 men and 3 women be seated in a row if the 3 women must sit together?

  1. 720
  2. 5040
  3. 144
  4. 360

Answer

A. 720

Solution

Treat the 3 women as one block, giving 5 units to arrange: 5!, times 3! ways to arrange the women within the block: 120×6=720.

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