what no. Must be removed from 1,2,3,4,5,6,7,8,9,10,11,12,13,14, so that the average increase to 8
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let the number to be removed be x
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assalterente:
That is wrong, when you add (-x) you need to add +1 to 14, which is the number of elements, so instead of 13 is 15. So you should remove 15
you can use the calculator to check that my answer is correct and yours is wrong
we don't add pls one since we are stating that they element to be removed is not there
also in average there is only addition, no subtraction
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