Question 34
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4 of 8 people are to sit in a row of 4 chairs, and A must be one of them. In how many ways?
- A 840 Correct
- B 1,680
- C 35
- D 210
Correct Answer: Option A
Choose the other 3: 7C3 = 35
Arrange all 4: 4! = 24
35 × 24 = 840
Trap: 1,680 is with or without A.
Answer: 840
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