Question

in a class of 100 students 25% are girls and rest. boys if 40% of the boys and 20% of the girls have black hair then find the percentage of students with black have the class ​

Answer 1

Answer:35%

Step-by-step explanation:

No. of girls =25*100/100

=25 girls

No. of boys =100-25=75 boys

No. of girls with black hair=

20*25/100

5 girls

No. of boys with black hair=

40*75/100

10*3

30 boys

Total no. =30+5 =35 students

%=35*100/100

=35%

Answer 2

Step-by-step explanation:

students with black hair =20 percent

total no of students = 100

so no of students =20/100 multiply 100=20