Question

There are 25 students in a class. The mean weight of boys is 50 kg and of girls is 40 kg. If
there are 15 boys in the class. Find the mean weight of all the students in the class.​

Answer 1

Answer:

46 kg

Step-by-step explanation:

Given,

Total number of students in the class = 25

The total weight of boys in the class = 15 boys ×50 kg mean weight for boys

=750

The total weight of girls in the class

=25-15

=10

therefore= 10×40

=400

The mean weight of all the students in the class= total weight of boys +total weight of girls in the class÷ total number of students in the class

=750+400/25

=1150/25

=46

Hence the mean weight of all the students in the class is 46 kg.

Answer 2

: Solution

46 kg is Answer

➝ Given

25 students in a class. The mean weight of boys is 50 kg and of girls is 40 kg

➝ Find

mean weight of all the students in the class.

➢ Total students = 25

➢Total boy's = 15

➢Mean weight of boy = 50 kg

➢total weight of boy = 15 × 50 =750 kg

➢Total girls = (25- 15) = 10

➢mean weight of girl = 40 kg

➢total weight of girl = 10 × 40 = 400

➢Mean weight of total students = 750+ 400/ 25

hence the mean weight of all the students are 46 kg