Question

Asked Oct 28, 2019

Step 1

From given information,

Let the sample be –

Sample = (P, E, N, C, I, L)

Four letter word code can be found as:

When, repetition of letters is allowed.

Step 2

The required number of ways are-

Step 3

1st place, 2nd place 3rd and 4th be filled up ...

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