High School

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------------------------------------------------ The letters from the word "alert" are used to form a password into a school computer system. How many 5-letter passwords can be formed if the letters can be used more than once?

A. 3125
B. 50
C. 120
D. 625

Answer :

The correct answer is a. 3125

That's because the letter can be used more than once, so if you start and try everything from aaaaa, to ttttt, the possibilities are huge and much larger than any of the lower numbers.

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