The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class.
47.55 kg
48 kg
48.55 kg
49.25 kg
Explanation:
| Required average | =$ \left(\dfrac{50.25 \times 16 + 45.15 \times 8}{16 + 8} \right) $ |
| =$ \left(\dfrac{804 + 361.20}{24} \right) $ | |
| =$ \dfrac{1165.20}{24} $ | |
| = 48.55 |