The bar graph shows the number of boys and girls in classes VI to X of a school.
What is the ratio of the total number of boys to the total number of girls in the five classes?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 23 : 21
Each total is the sum of the five bars of that colour; the ratio is then reduced to lowest terms.
Boys \(=45+50+42+38+55=230\)
Girls \(=40+35+48+42+45=210\)
Ratio \(=230:210=23:21\) (dividing both by 10)
Boys and girls are in the ratio 23 : 21.