Question

find the no. of strings of 4 letters can be formed with the letters of the word EXAMINATION

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Answer 1

Answer:

The answer is 10!.

Step-by-step explanation:

Take A as a single letter(the letter A appears twice in the spelling).Now there are 10 letters. Therefore the answer is 10!=1×2×3×4×5×6×7×8×9×10=3628800

Answer 2

Answer:

2454

Step-by-step explanation:

Explanation is attached here