### The mean weight of 100 students in a class is 46 kg. The mean weight of boys is 50 and of girls is 40 kg. Therefore, the number of boys is:

**A.** 50

**B.** 60

**C.** 70

**D.** 65

## Show Answer

### Answer-B

Solution-

__Solution(By Apex Team)__

Let number of boys are x and then number of girls
= (100 – x)
Thus,
50x + (100 – x) × 40 = 46 × 100
→ x = 60
Number of boys = 60