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A museum has 6 gates. Gopal enters by one gate and leaves by any gate, possibly the same one. In how many ways can he do this?

Competition practicePermutations & Combinations
  • A30
  • B36
  • C12
  • D15

Step-by-Step Solution

Enter: 6 ways; leave: 6 ways (the same gate is allowed). . (30 forbids the same gate.)
Answer: B) 36

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