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How many ways are there to arrange 3 cards selected from 5 different cards in order?

Answer and explanation

Correct answer: 60

Because three cards are selected and placed in order, this is a permutation rather than a combination. For the first position there are 5 choices, for the second there are 4 remaining choices, and for the third there are 3 choices. By the multiplication principle, the number of ordered arrangements is 5×4×3=60. Equivalently, 5P3=5!/(5-3)!=5!/2!=60. Therefore option B is correct. The value 10 is 5C3 and counts selections where order is ignored; multiplying 10 by 3! gives 60. The value 15 does not represent the required ordered selection, and 125 incorrectly allows replacement at every stage.

Related tags

PermutationsOrdered SelectionMultiplication PrinciplePermutations And CombinationsMathematicsClass 11 Mcq

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