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Out of 7 consonants and 4 vowels, words are to be formed by involving 3 consonants and 2 vowels. The number of such words formed is :A. 25200B. 22500C. 10080D. 5040

Answer» Correct Answer - A
Number of words `= 5! xx .^(7)C_(3) xx .^(4)C_(2)`
`= 120 xx (7!)/(4!3!) xx (4!)/(2!2!) = 25200`


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