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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 ?
Answer & Solution
Correct Answer:
Option
B
According to the question,
Average = $$\frac{30 × 16 + 20 × 15.5}{50}$$
= $$\frac{480 + 310}{50}$$
= $$\frac{790}{50}$$
= 15.8 kg
Average = $$\frac{30 × 16 + 20 × 15.5}{50}$$
= $$\frac{480 + 310}{50}$$
= $$\frac{790}{50}$$
= 15.8 kg
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