Five-letter words are to be formed out of the letters of the word | Filo
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Class 11

Math

Algebra

Permutations and Combinations

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Five-letter words are to be formed out of the letters of the word INFINITESIMAL. What is their number?

Solution: INFINITESIMAL
13 letters ( diff.) 9 types

All diff. 

2 alike, 3 diff. 

2 alike, 2 alike, 1 diff.  .

3 alike, 2 diff. 

3 alike, 2 alike

4 alike, 1 diff.

Total .
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