Question

plz anyone answer my questions asap

Answer 1

given
the total weight average of 20 students is 33.
the average weight of boys is 35
the number of girls in the class is 8
average weight of 8 girl i ?

so number of boys in the class = total number of students - total number of girls
=20 - 8
=12
so number of students in class is 12
total weight of students =total average of students * total number of students
=33*20
=660
the weight of the boys =average of boys weight * number of boys
=35*12
=420
do Average of girls weight = total weight of students -total weight of boys /no of girls
=660-420/8
=240/8
=30
so the average of girls weight is 30