1.

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

Answer»

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



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