**Average weight of 25 boys in a class is 48 kgs. The average weight of the class of 40 students is 45 kgs. What is the average weight of the 15 girls in the class? **

- 44 kgs
- 42 kgs
- 40 kgs
- 39 kgs
- 42.5 kgs

Answer – **40 kgs**. Choice (3)

**Solution**

**Total weight of boys in the class **= 25 *48 = 1200 kgs

**Total weight of all students in the class** = 45 * 40 = 1800 kgs

**Total weight of the girls in the class **= 1800 – 1200 = 600 kgs

**Average weight of girls **= 600 / 15 = 40 kgs

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Sure 40.