In a pre school, the average weight of 30 girls in a class among 50 students is 16 kg and that of the remaining students is 15.5 kg. What is the average weight of all the students in the class ?

A. 15.2 kg

B. 15.8 kg

C. 15.4 kg

D. 15.6 kg

Answer: Option B

Solution(By Examveda Team)

According to the question,
Average = $$\frac{30 × 16 + 20 × 15.5}{50}$$
= $$\frac{480 + 310}{50}$$
= $$\frac{790}{50}$$
= 15.8 kg