the number of boys and girls in a class are in the ratio 7:5.the number of boys is 8 more then the number of girls what are their present girls
Answers
Correct Question :
The number of boys and girls in a class are in the ratio 7:5. The number of boys is 8 more then the number of girls. What is the total strength of the class.
Given :
- The number of boys and girls in a class are in the ratio of 7:5
- The number of boys is 8 more than the number of girls.
To find :
- Total number of students.
According to the question,
Let the ratio be 7x and 5x
And the number of boys 8 more than the number of girls is 5x + 8
→ 5x + 8 = 7x
→ 8 = 7x - 5x
→ 8 = 2x
→ 8 ÷ 2 = x
.°. x = 4
Value of 7x :
→ 7x
→ 7(4)
→ 28
Value of 5x :
→ 5x
→ 5(4)
→ 20
.°. The total strength of the class
= 28 + 20
= 48
Answer:
Ratio of Boys : Girls is 7 : 5
Thus the no. of Boys are 7x and no. of girls are 5x
As per statement there are 8 more boys than girls. This means
7x - 5x = 8
2x = 8
x = 4
Rational is 4 therefore
No. of Boys = 7x = 7 × 4 = 28 boys
No. of Girls = 5x = 5 × 4 = 20 girls
Total number of Students = 28 boys + 20 girls
Total number of students = 48
Answer there are 28 boys and 20 girls in the school and total number of students are their in the class