Question

12.
Amol was asked to calculate the arithmetic meall
had two digits. By mistake, he interchanged the two digits, say a and b, in one of these ten
integers. As a result, his answer for the arithmetic mean was 1.8 more than what it should
have been. Then b - a equals
1) 1
2)2
4) None of these
3) 3

Answer 1

Answer:

2 is the right answer

OPTION 2