Out of 7 different consonants and 4 different vowels, how many words (not necessarily meaningful) of 4 consonants and 2 vowels can be formed?
Question and options
Out of 7 different consonants and 4 different vowels, how many words (not necessarily meaningful) of 4 consonants and 2 vowels can be formed?
- 151200
- 210
- 720
- 142500
Answer and explanation
Correct answer: A - 151200
Choose consonants C(7,4)=35, vowels C(4,2)=6, arrange 6 letters 6! = 720: 35 x 6 x 720 = 151200.
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