Answer:
270 students
Explanation:
There are more boys than girls, as the ratio of boys to girls is 4:5.
Write and solve an equation of ratios:
4 5
-------- = --------
120 g
... where g is the number of girls. Cross multiplying, we get:
4g = 600, so that g must be 150.
120 boys plus 150 girls comes to 270 students (Answer d)