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Q.

Out of 7 consonants and 5 vowels the number of different words can be formed each consisting of 3 consonants and 2 vowels is

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a

350

b

42,000

c

4,200

d

1800

answer is B.

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Detailed Solution

=7c3×5c2×5! =35×10×120=42000 the number of different words can be formed each consisting of 3 consonants and 2 vowels 7 consonants and 5 vowels is  42,000
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