Practice | Hashtable

1. How many Permutations of the letters of the word APPLE are there?

A. 600

B. 120

C. 240

D. 60

Solution:

APPLE = 5 letters.
But two letters PP is of same kind.
Thus, required permutations,

\begin{aligned} = \frac{5!}{2!} \\ = \frac{120}{2} \\ = 60 \end{aligned}

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