Average daily wage of 50 workers of a factory was 200

Average daily wage of 50 workers of a factory was 200. Each worker is given a raise of 20. What is the new average daily wage ?

Increase in wages of each worker = Rs 20
Total increase in wages = 50 x Rs 20 = Rs 1000 Total wages before increase in wages
= 50 x Rs 200 = Rs 10000 Total wages after increase in wages
= Rs 10000 + Rs 1000 = Rs 11000
New average wages = $\frac { \Sigma X }{ N } $=$\frac { 11000 }{ 50 } $= Rs 220
Thus, mean wage will increase by Rs 20.