Question

there are 30 students in a class. 20% have black hair. 10% have blonde hair and 70% have brown hair
find the number of students who have
1: black hair
2:brown hair
3" blonde hair

Answer 1

Answer:

1. black hair = 6 students

2. brown hair = 21 students

3. blonde hair = 3 students

Step-by-step explanation:

1 . number of black hair students = ( percentage of black hair students / 100 ) x total number of students in class

= ( 20 / 100 ) x 30

= 600 / 100 = 6

so 6 students have black hair

2. number of brown hair students= ( percentage of brown hair students/ 100) x total number of students in class

= ( 70 / 100 ) x 30

= 2100 / 100 = 21

so 21 students have brown hair

3.  number of blonde hair students= ( percentage of blonde hair students/ 100) x total number of students in class

= ( 10 / 100 ) x 30

= 300 / 100 = 3

so 3 students have blonde hair

Answer 2

Step-by-step explanation:

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