Question

Consider a class of 45 students whose average weight is 50 Kgs. M new students join this class whose average weight is n Kgs. If it is known that m + n = 60, what is the maximum possible average weight of the class now?

• A. 51 Kg
• B. 51.5 Kg
• C. 50.45 Kg
• D. 50.5 Kg

Answer 1

The correct option is D 50.5 Kg

The maximum possible average is obtained when n=5
Required average =$\frac{(45\times 50)+(5\times 55)}{50}=50.5$ Kg