Question 26
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Three married couples sit in a row so that each husband sits next to his wife. In how many ways?
- A 48 Correct
- B 720
- C 96
- D 24
Correct Answer: Option A
Couples as 3 units: 3! = 6
Each couple can swap: 2³ = 8
6 × 8 = 48
Trap: 6 or 24 forget the swaps.
Answer: 48
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