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Question

Out of 5 consonants, 4 vowels and 3 capitals how many words can be formed each containing 3 consonants, 2 vowels and beginning with a capital?

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Solution

Cap.(3) Con.(5) Vow(4)
3C1.5C3.4C2×5!
=3×10×6×120=216000.
Note: 5! and not 6! as capital letter is fixed in the beginning.

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