- A720
- B56
- C336
- D504
Step-by-Step Solution
Choose 3 chairs with no two adjacent: think of the 7 empty chairs making 8 gaps, choose 3 gaps, . The friends then sit in orders. .
Answer: C) 336
Three friends sit in a row of 10 chairs so that no two of them are in neighbouring chairs. In how many ways can they sit?
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