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 ?

Question

নিচের অপশন গুলা দেখুন

• 15.6 kg
• 15.8 kg
• 15.2 kg
• 15.4 kg

Answer 1

সঠিক উত্তর হচ্ছে: 15.8 kg

ব্যাখ্যা:

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