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A 5-letter code has vowels in its first 3 places and consonants in its last 2 places. There are 5 available vowels and 7 available consonants, with no letter repeated. How many codes are possible?

Answer and explanation

Correct answer: 2520 codes

The first three places can be filled with distinct vowels in 5 × 4 × 3 ways. The last two places can be filled with distinct consonants in 7 × 6 ways. Thus, the total is 5 × 4 × 3 × 7 × 6 = 2520 codes.

Related tags

Counting PrinciplePermutationsFundamental Principle Of CountingPermutations And CombinationsMathematicsClass 11 Mcq

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