Question

There are 50 students in a class out of which 20 are girls. The average weight of 20 girls is 45kg and that of 30 boys is 52kg . Find the mean weight in kg of the entire class.

Answer 1

The answer should be 49.2

Answer 2

The average weight of entire class is 49.2 kg.

Step-by-step explanation:

Since we have given that

Number of students = 50

Number of girls = 20

Number of boys = 30

Mean of girls = 45 kg

Mean of boys = 52 kg

So, According to question, the mean weight of entire class is given by

$\dfrac{20\times 45+30\times 52}{50}\\\\=\dfrac{2460}{50}\\\\=49.2\ kg$

Hence, the average weight of entire class is 49.2 kg.

# learn more:

There are 45 students in a class out of which 15 are girls. The average weight of 15 girls is 45kg and the 30 boys 52 kg. Find the average weight of whole class​

https://brainly.in/question/9892887