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How many ways 4 letters can be selected from
The word RANDHEER
(a) 4distinct
(B) 2 Identical and 2 distinct

Manish kumar , 5 Years ago
Grade 12th pass
anser 2 Answers
Vikas TU

Last Activity: 5 Years ago

Hiii 
4 letters can be selected 
  1. All are distinct =7C4
  2. 2 identical and 2 distinct = 8C2/2! + 6C2
  3. Hope this will clear . we divide by 2 in 2nd because it is sameletter.

Manish kumar

Last Activity: 5 Years ago

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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