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Subjects
Class 11MathematicsPermutations and CombinationsFundamental principle of countingHard
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A code has first (3) distinct letters from the English alphabet and then (2) digits. The first digit cannot be (0) and digits may repeat, so how many codes are possible?

Answer and explanation

Correct answer: (1404000)

For letters there are (26\times25\times24) choices and for digits (9\times10) choices. In exams multiply the choices at each stage.

Related tags

Permutations-And-CombinationsFundamental-PrincipleCountingHardFundamental Principle Of CountingPermutations And CombinationsMathematicsClass 11 Mcq
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