find the number of ways of selecting 4 letters from the word EXAMINATION?
ANS: 136 WAYS.
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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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