Permutations and Combinations Questions

1:

How many five different letter words can be formed out ofthe word "LOGARITHMS"?

A.

20120

B.

30120

C.

30240

D.

40840

 

Answer : C

Explanation :

Total letters in the word "LOGARITHMS" is 10,i.e. n=10 and we have to form five-letter words
r = 5 Required number of words,

           = 10 x 9 x 8 x 7 x 6

           = 30240

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Option: A

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