Question

Arithmetic mean of 5 numbers is 27 if one number is missed by mistake then arithme
tic mean is 25 find the missing number

Answer 1

the mean of 5 no. is 27.
the sum of 5 no is 5×27=135
the mean of 4 no is 25
the sum of 4 no is 4×25=100
the missing no is 135-100=35