While writing the cases, we only included some of the possible ages, not all cases. And in the solution, we took sum of only the cases we wrote and by chance we got two cases where they are repeating. And writing all the cases is not feasible. How would we know which cases to write and not?
Writing the sample space
hello @crunchybanana
1 * 1 * 72 = 72
1 * 2 * 36 = 72
1 * 3 * 24 = 72
1 * 4 * 18 = 72
1 * 6 * 12 = 72
1 * 8 * 9 = 72
2 * 2 * 18 = 72
2 * 3 * 12 = 72
2 * 4 * 9 = 72
2 * 6 * 6 = 72
3 * 3 * 8 = 72
3 * 4 * 6 = 72
only these possibilities are there.
which u can write on ur own.its feasible
its not possible to find the solution without writing and analysing all cases
I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.
On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.