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Subjects
Class 11MathematicsPermutations and CombinationsFundamental principle of countingEasy
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How many (4)-digit numbers can be formed from digits (1,2,3,4) without repetition?

Answer and explanation

Correct answer: (24)

The four positions have (4,3,2,1) choices, so (4\times3\times2\times1=24). If all digits are used, choices decrease step by step.

Related tags

Permutations And CombinationsCounting PrincipleDigitsFundamental Principle Of CountingMathematicsClass 11 Mcq
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