In a class, the average weight of 4 boys is 50 kg and the average weight of 4 girls is 40 kg. What is the average weight of all the 8 students taken together?
Answer & explanation
Correct answer: option 3
Sum of weight o 4 girls = 4 × 40 = 160 kg
Sum of weight of 4 boys = 4 × 50 = 200 kg
Average of all 8 students = \(\frac{200 + 160 }{8}\) = 45 kg