SOLUTION: In a class of 30 students, 20%have back hair, 10%have blond hair, 70%have brown hair. Calculate the number of students with; a) black hair b)blonde hair c)brown hair

Question 1167085: In a class of 30 students, 20%have back hair, 10%have blond hair, 70%have brown hair. Calculate the number of students with;
a) black hair
b)blonde hair
c)brown hair
Answer by dkppathak(439) (Show Source): You can put this solution on YOUR website!
In a class of 30 students, 20%have back hair, 10%have blond hair, 70%have brown hair. Calculate the number of students with;
a) black hair
b)blonde hair
c)brown hair
solution
a) Black Hair 30x0.2=6 students
b) Blonde Hair =30x0.1=3 students
c) Brown Hair =30x0.7=21 students

RELATED QUESTIONS
in a class of 30 students.20% have black hair,10%have blonde hair and 70% have brown hair (answered by ikleyn)

In a class, 50% of the students have brown hair, 25% have black hair, 20% have blonde... (answered by opeodu)

If 40% of a school are boys, and 30% of students have blond hair, and there are three... (answered by ankor@dixie-net.com)

In your class, there are 15 students with brown hair, 3 students with blonde hair, and 5... (answered by erica65404)

There are 100 students. 40% of them have brown hair. 30% that have brown hair are boys. (answered by robertb)

There are 100 students in a school year group. On one day 99% of the students are... (answered by macston)

in a factory, the ratio of employees with blond hair to employees with black hair... (answered by ewatrrr)

a club has 100 members, and 40% of the members have brown hair. Of those with brown hair, (answered by ewatrrr)

There are 50 students in class. 40 students wear glasses and 30 have dark hair. What is... (answered by ikleyn)