The number of 4 letter words (with or without meaning) that can be | Filo
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Class 11

Math

Algebra

Permutations and Combinations

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The number of letter words (with or without meaning) that can be formed from the eleven letters of the word
'EXAMINATION' is _______

  1. 2454
Correct Answer: Option(a)
Solution:

Case I            All different

Case II          2 same 2 different
 
Case III         2 same 2 other same

Total
           
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