A student finds the average of 10, 2-digit numbers. If the digits of one of the numbers is interchanged,the average increases by 3.6. The difference between the digits of the 2-digit numbers is

A student finds the average of 10, 2-digit numbers. If the digits of one of the numbers is interchanged,the average increases by 3.6. The difference between the digits of the 2-digit numbers is
1). 4
2). 3
3). 2
4). 5

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