Advertisement

### Question

There are three sections in school with 40, 40 and 40 students respectively. The average weight of a student in these sections, respectively, is 3, 3 and 2 Kg. What is the average weight of all the the students of the combined sections?

**A**

$2{2/3}$.

**B**

$2{27/40}$.

**C**

$2{79/120}$.

**D**

$2{13/20}$.

**Soln.**

**Ans: a**

The sums of the weights of all the students is 40 × 3 + 40 × 3 + 40 × 2 = 320. The required average = 320/total students = $320/{40 + 40 + 40}$ = ${8/3}$, which is same as: $2{2/3}$.