If the average weight of 6 students is 50 kg; that of 2

Home » Aptitude » Average » Question

If the average weight of 6 students is 50 kg; that of 2 students is 51 kg; and that of other 2 students is 55 kg; then the average weight of all students is

We can find the required average weight with the help of given formula ,
Here, n₁ = 6 , a₁ = 50 kg
n₂ = 2 , a₂ = 51 kg , n₂ = 2 , a₂ = 55 kg

∴ Average =	n₁a₁ + n₂a₂ + n₃a₃
	n₁ + n₂ + n₃

Required average weight =	(50 × 6 + 51 × 2 + 55 × 2)
	10

Required average weight =	300 + 102 + 110
	10

Required average weight =	512	= 51.2 kg.
	10