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CPT 681 views 3 replies

find the number of ways of selecting 4 letters from the word EXAMINATION?

ANS: 136 WAYS.

Replies (3)

 

EXAMINATION consists of 11 letters - AA, II, NN, E, X, M, T, O.

Possible combinations:

1) 3C2 = 3 ways

2) 3C1×7C2 = 63 ways

3) 8C4 = 70 ways

Hence, by combining above you gets 3 +63 +70 = 136 ways.

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