Question

the average monthly salary of 15 workers in a factory is rs. 285. if the salary of the manager is included,the average becomes rs.355 . what is the manager's salary

Answer 1

Answer is 355*16-285*15=Rs1450

Answer 2

sum of observations= 285×15=4275
let the salary of the manager be = "x"
now
no. of observations =16
average=sum of observations÷no.of observations
355 =(4275 + x ) ÷ 16
355 × 16 = 4275 + x
5680 - 4275 = x
1405 = x