A student finds the average of ten 2 digits numbers. While copying numbers, by m

Question

A student finds the average of ten 2 digits numbers. While copying numbers, by mistake, he writes in number with its digits interchanged. As a result his answer is 1.8 less than the correct answer. The difference of digits of the number, in which he made mistake is ?

Options:

A . 2

B . 3

C . 4

D . 6

Answer: Option A

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