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  1. How many words of 4 consonants and 3 vowels can be made from 12 consonants and 4 vowels. If all the letters are different ?
    1. 251820
    2. 258120
    3. 281520
    4. 285120
Correct Option: D

Required no. of words = 12P4 x 4P3
= 12 x 11 x 10 x 9 x 4 x 3 x 2
= 120(100 - 1) x 24
= 288000 - 2880
= 285120


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