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How many five digits numbers are there out of which all are odd?

How many five digits numbers are there out of which all are odd?

Grade:9

2 Answers

Arun
25750 Points
6 years ago
Dear student
As we odd digit are = 1, 3, 5, 7, 9
Now we have to use them to make a  5 digits number.
Case 1- repetitions allowed
5 *5 *5 *5 *5 = 55
Case 2- repetitions not allowed
5* 4* 3* 2* 1 = 5! = 120
Regards
Arun(askIITians forum expert)
Umang
13 Points
6 years ago
Odd numbers are1,3,5,7,9,11

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