Question

1100 boys and girls 700 are examined in a test.42% of the boys and 30% of the girls pass. the percentage of the total who failed is

Answer 1

No. of boys =1100. No. of girls= 700 No. of boys pass=42÷100×1100. =462.
No. of girls pass=30÷100×700
=210
Total no. of students= 1100+700=1800
Total no. of pass =462+210=672
Students who failed = 1800-672 =1128

Answer 2

given ,no.of boys =1100 & no.of girls =700
percentage of passed boys 42% & girls 30%
now,
total no.of passed boys = 462
total no.of passed girls =210


and total no. of students = 1100 + 700=1800
total no. of passed students = 210+462=672
no.of failed students = total no. of students - total no of failed students
= 1800-672
=1128
so, percentage of failed students = 1128 ÷ 1800×100=62.666


hope it will help