How many 4-digit numbers are there, when a digit may be repeated any
number of times?
Answers
Answered by
0
i think it will be 24
Answered by
2
so you have to have a idea of permutations there are 10 digits from 0 to 9 so 0 cant be is first place so the 1st place can be arranged 10 -1 ways and the other three places in 10 ×10 ×10 ways
the answer is 9× 10 ×10 ×10 = 9000 ways is the answer
the answer is 9× 10 ×10 ×10 = 9000 ways is the answer
Anonymous:
any question please ask and plz mark as best
Similar questions