other govt exam BARC DAE Junior Purchase Assistant / Junior Storekeeper Mock Test Quantitative Aptitude Average
A student finds the average of 12 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 3 less than the previous one. What was the difference of the two digits a and b?
1
8
2
6
3
4
4
7