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A hall has 12 gates. In how many ways can a man enter the hall

Question

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?

A

144

B

132

C

121

D

156

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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?

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Text solutionVerified

The person can enter the hall in 12 gates and exit from any of the other 11 gates.
Hence the total number of ways

= 12 \times 11 = 132

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Question Text	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?
Answer Type	Text solution:1
Upvotes	150