Question

a class f 80 is 25% girls.if 10% of the boys and 20% of the girls are attended a picnic , what is the percent of the class attended?

Answer 1

Number of girls = 80 × 25/100 =20
Number of boys = 80-20 = 60
Boys and girls are attended a picnic =60×(10/100)+20× (20/100)=10
Class Attendance= 80 -10 =70
Class attendance% = (70/80 )×100=87.5%