Raial has 7 different posters to be hanged in her bedroom, living room and kitchen.
MATHEMATICS
JAMB 2011
Raial has 7 different posters to be hanged in her bedroom, living room and kitchen. Assuming she has plans to place at least a poster in each of the 3 rooms, how many choices does she have?
- A. 49
- B. 170
- C. 21
- D. 210
Correct Answer: D. 210
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