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Number of words consisting of two vowels and two consonants which can be made out of the letters of word "DEVASTATION" is |
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Answer» 126 `(.^(5)C_2 XX .^(4)C_(2))4 ! + .^(5)C_(2) (4!)/(2!) + .^(4)C_(2) (4!)/(2!) + 1 + (4!)/(2!2!)` |
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