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In a 12 storied building, 3 persons enter a lift cabin. It is known that they will leave the lift at different floors. In how many ways can they do so if the lift does not stop at the second floor?
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Dec 10, 2021
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Dec 26, 2021
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kritika
In a 12 storied building, 3 persons enter a lift cabin. It is known that they will leave the lift at different floors. In how many ways can they do so if the lift does not stop at the second floor?
(A) 36
(B) 120
(C) 240
(D) 720
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Ans: (D)
Hint : Total no. of ways \(=10_{p_{3}}=720\) (except the floor they enter and second floor)
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