Question

There are 50 numbers. Each number is subtracted from 53 and the mean of the numbers so obtained is found to be -3.5. The mean of the given numbers is _______
a) 46.5
b) 49.5
c) 53.5
d) 56.5

Answer 1

Step-by-step explanation:

Let be the mean of 50 numbers be X

mean value after subtraction of 50 numbers from 53 is -3.5

-3.5 =( (53 * 50) ÷ 50 ) - X

-3.5 = 53 - X

X = 53+3.5

X = 56.5

so, the mean of given numbers is 56.5

The answer is d.