In a school bus, there are 54 students, the ratio of boys to girls is 5 : 4. If 3 boys leave the bus at their stop, the ratio of boys to girls would be?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 9 : 8
A ratio of 5 : 4 splits the total into \(5+4=9\) equal parts, so each part is \(54\div9=6\) students. Only the boys change afterwards.
Boys \(=5\times6=30\), girls \(=4\times6=24\)
After 3 boys leave: boys \(=30-3=27\), girls still 24
New ratio \(=27:24=9:8\)