CBSE Class 11-science Answered
permutation and combination
Asked by soukarshadhar2006 | 31 Mar, 2010, 09:29: AM
Expert Answer
To make a 4 letter word consisting of 2 vowels and 2 consonants
there are 21 consonents and 5 vowels
2 types of letters at 4 places can be done in 4C2 ways
Two consonanats can be selected in 21X21 ways
Two vowels can be done in 25 ways
total ways = 6x25x441
Answered by | 31 Mar, 2010, 10:15: AM
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