Question 101
Find the average of all 5-digit numbers that satisfy the following:
* The number is of the form $\overline{ab0cd}$, that is, its third digit is zero;
* Digits are pairwise distinct;
* Both numbers $\overline{ab0cd}$, and $\overline{dc0ba}$ are divisible by 7.
* The number is of the form $\overline{ab0cd}$, that is, its third digit is zero;
* Digits are pairwise distinct;
* Both numbers $\overline{ab0cd}$, and $\overline{dc0ba}$ are divisible by 7.