Question

The number of 4 letter words (with or without meaning) that can be formed from the eleven letters of the word 'EXAMINATION' is _______.

Answer 1

EXAMINATION

(AA)(II)(NN)(EXMOT)

to form four letter words (1) All same .................not possible (2) 1 different, 3 same..............not possible

Answer 2

N → 2, A → 2, I → 2, E, X, M, T, O → 1