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Question

There is a building of 6 floors.Four persons enter the lift in on the ground floor.Each of them can leave the cabin in any of the six floors beginning with first floor. In how many ways they can leave the lift.

A
46
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B
2420
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C
64
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D
24
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Solution

The correct option is C 64
Number of Floors =6
Number of person =4
Each person has 6 possible ways of getting off lift
The other person also has 6 ways
Each of the 4 people has 6 ways
Therefore there are no restriction
Therefore Total number of ways
(6)4 Ways
Hence the correct answer is (6)4

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