Grade 99 grade maths
How many five digits numbers are there out of which all are odd?
2 Answers
Arun
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
Odd numbers are1,3,5,7,9,11
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