Question

Average weight of the class is 50 kg. NOW students

are divided into two groups of 30 and 20 students.if

the average weight of the first group is 45 kg,what will

be the average weight of the second group.

Note: There are 50 students in total.​

Answer 1

Answer:

Your answer is 57.5kg

Step-by-step explanation:

avg. wt. of 50 students=50kg

so, total wt. of 50 students=50×50=2500kg

again it is said that, avg. wt. of 30students = 45kg

so, total weight of 30 students is = 45×30=1350kg

so, total weight of 20 students is= 2500-1350=1150kg

therefore the average weight of 20 students is= 1150÷20=57.5kg