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Subjects
Class 11MathematicsPermutations and CombinationsFundamental principle of countingHard
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A word-style code has the order vowel-consonant-vowel-consonant. There are (5) vowels and (21) consonants, vowels cannot repeat and consonants cannot repeat. How many codes are possible?

Answer and explanation

Correct answer: (8400)

Vowels are chosen in (5\times4) ways and consonants in (21\times20) ways. The total is (5\times21\times4\times20=8400).

Related tags

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