Question

The average kilogrammes of 20 boys in a classroom is 45kg. The average kilogram of 30 girls in a classroom is 40 kg. What is the average kilogram of all the students in a classroom?

Answer 1

Answer:

Average is 42 kgs

Step-by-step explanation:

Average of 20 boys weight=45

Total weight of boys =45×20= 900 kg

Average of 30 girls weight =40

Total weight of girls=40×30= 1200 kgs

Total weight of 30boys and 20girls = 900+1200= 2100 kgs

Average of weight of students in a classroom = 2100/50 =42 kgs