A hall has 12 gates. In how many ways can a man enter the hall thr | Filo
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Class 11

Math

Co-ordinate Geometry

Straight Lines

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A hall has 12 gates. In how many ways can a man enter the hall through one gate and come out through a different gate?

Correct Answer: Option(b)
Solution: The person can enter the hall in 12 gates and exit from any of the other 11 gates. 
Hence the total number of ways
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