Question: Average of 10 two digit positive integer is Z. However one number AB is taken as BA, then the average increases to Z + 2.7.

Average of 10 two digit positive integer is Z. However one number AB is taken as BA, then the average increases to Z + 2.7.

What is the value of |B – A|?

(a) 1

(b) 2

(c) 3

(d) 4

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