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How many ways 4 letters can be selected from The word RANDHEER (a) 4distinct (B) 2 Identical and 2 distinct
Hiii 4 letters can be selected All are distinct =7C4 2 identical and 2 distinct = 8C2/2! + 6C2 Hope this will clear . we divide by 2 in 2nd because it is sameletter.
I think 2nd answer is not clear my doubts Whe have total 8 words in which 2 words(A,A)identical then In (2) 2 identical and 2 non identical So selection important 2C2(for identical )5C2 for non identical Then final answer =2C2×5C2
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