Question

There are 50 students in a class. One of them weighing 50 kg goes away and a new students joins. By this the average weight of the class increases by $\frac{1}{2}kg$. The weight of the new student is

• A. 70 kg
• B. 72 kg
• C. 75 kg
• D. 76 kg

Answer 1

The correct option is C 75 kg

Total weight increase $=\frac{1}{2}\times 50=25$
$\therefore$ weight of the new student is $50+25=75kg$