Question

how many 3 digits numbers can be formed from the digits 1,2,3, 4 and 5 assuming that repition of the digit is allowed​

Answer 1

Answer:

I think infinite

Step-by-step explanation:

think only

Answer 2

Answer:

Since repetition of digits is not allowed we are left with 5 digits to fill up the Tens place. So Tens place can be filled up in 5 ways. Using the same argument we can fill up the Units digit in 4 ways. Hence we can form (6)(5)(4) = 120 numbers of three digits using the digits 1,2,3,4,5,6 without repetition.

Step-by-step explanation:

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