Question

The average weight of 30 boys and girls is 45kg.if the average weight of 20 boys out of them is 43.5kg then average weight of girls is

Answer 1

Answer:

SOLVED

Step-by-step explanation:

10M + 20(43.5) = 30(45)

M = 48

Answer 2

The average weight of girls is 48 kg.

Step-by-step explanation:

Given that the 30 boys and girls have an average weight of 45 kg.

So, the total weight of 30 boys and girls is (45 × 30) = 1350 kg.

Now, it is also given that, the average weight of the total of 20 boys is 43.5 kg.

So, the total weight of 20 boys is (43.5 × 20) = 870 kg.

Hence, the total weight of remaining (30 - 20) = 10 girls is (1350 - 870) = 480 kg.

Therefore, the average weight of the remaining 10 girls is $\frac{480}{10} = 48$ kg. (Answer)