The average weight of 15 students of a class is 60kg i 5 students leave the da
whose average weight is 40 kg. What is the average weight of the 10 students
who are left in the class ?
1) 75 kg 2) 80 kg 3) 70 kg
4) 60 KR
5) 65 Kg
sijon two equations are given. You have
Step-by-step explanation:
(Sum of 15 students)/15 = 60 kg
Sum of 15 students = 60 × 15 kg
= 900 kg
5 students left the class
(Sum of 5 students)/5 = 40 kg
Sum of 5 students = 40 × 5 kg
= 200 kg
Sum of the 10 students who left in the class =
= Sum of 15 students – Sum of 5 students
= 900 kg – 200 kg
= 700 kg
Avg of the 10 students is = 700/10
= 70 kg
hence, the answer is 70 kg