How many odd five-digit counting numbers can be formed by choosing digits from the set {1,2,3,4,5,6,7} if digits can be repeated?
There is a link to the same problem
https://web2.0calc.com/questions/help_87069
Hope this link helps
- hihihi
7 * 7 * 7 * 7 * 4 = ....... possibles