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The average of ten numbers is A. If c is subtracted from each number, except the tenth, and (c - 1) is subtracted from the tenth number, then what will be the new average?

The average of ten numbers is A. If c is subtracted from each number, except the tenth, and (c - 1) is subtracted from the tenth number, then what will be the new average? Correct Answer A - c + 0.1

Given:

Average of ten numbers is A.

Formula Used:

Average = Total number of observations/Number of observations

Calculation:

Total of ten numbers is 10A.

Total of ten numbers when c is subtracted from each number is 10A - 9C - (C-1)

New average will be = (10A - 9C - C + 1)/10 

∴ New average is A - C + 0.1

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