Question

The average weight of 20 students of a class is 33 kg. if the average weight of all the boys is 35 kg and average weight of all the eight girls is y kg, then the value of y is ??

Answer 1

Answer:

33=(8y+12*35)/20

33=2(4y+210)/20

33=(4y+210)/10

4y+210=330

4y=330-210

4y=120

y=120/4

y=30

average weight of all 8 girls is 30.

Step-by-step explanation: