50 numbers are given. Each number is subtracted from 53 and the mean of the numbers thus obtained is -3.5. The mean of the given numbers is -

Explanation

$\because$ If the average of m numbers is n, and a certain number t is subtracted from or added to each number, then a decrease/increase of t is obtained in the average as well.' As per the question The mean of the given 50 numbers = $53 + 3.5$ = $56.5$