Out of 7 constants and 4 vowels how many words of 3 consonants and 2 vowels can be formed?	Choices: A) 14571 B) 36512 C) 45120 D) 54120 E) 25200
Number of ways of selecting (3 consonants out of 7) and (2 vowels out of 4)   = 7C3 * 4C2   = 210   Number of groups each having 3 consonants and 2 vowels = 210   25200ach group contains 5 letters   Number of ways of arranging 5 letters among themselves   = 5! = (5 * 4 * 3 * 2 * 1)   = 210   Required number of words = (210 * 210)   = 25200   Ans: 25200
<result>E</result>
Out of 7 constants and 4 vowels how many words of 3 consonants and 2 vowels can be formed?