If the four letter words (need not be meaningful) are to be formed using the letters from the word "MEDITERRANEAN" such that the first letter is R and the fourth letter is E , then the total number of all such words is :

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Correct answer: B. 59

M, EEE, D, I, T, RR, AA, NN R _ _ _ _ _ _ E _ _ Two empty places can filled with identical letters [EE, AA, NN] ⇒ 3 ways Two empty places, can be filled with distinct letters [M, E, D, I, T, R, A, N] ⇒ ^ 8 P _ 2 ∴ Number of words 3 + ^ 8 P _ 2 = 59

If the four letter words (need not be meaningful) are to be formed...

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