# There are 100 students in a Number of boys is 10 more than the number of girls

There are 100 students in a Number of boys is 10 more than the number of girls. The average weight of boys is 50 kg and average weight of the whole class is 45.5 kg. The average weight of girls is (in kg)

- 40
- 45
- 50
- 52

**Answer: (1) 40 **

**Solution:-**

The total number of students = 100

The number of boys is 10 more than the number of girls.

Then, the number of boys and girls = 55 and 45

The average weight of boys = 50 kg.

Then, the total weight of 55 boys = 55 x 50

= 2750 kg

The average weight of whole class = 45.5 kg

Then, total weight of whole class = 45.5 x 100

= 4550 kg

So, total weight of 45 girls = 4550 – 2750

= 1800 kg

Then, the number of girls = 1800/45

= 40

Hence, the correct answer is option (1) 40.