A student finds the average of 10 positive integers. Each integer contains two digits. By mistake, the boy interchanges the digits of one number say ba for ab. Due to this, the average becomes 1.8 less than the previous one. What was the difference of the two digits a and b?

Submitted by: Administrator
1. 8
2. 6
3. 2
4. 4

Ans : C
Submitted by: Administrator

Read Online GMAT Job Interview Questions And Answers