Answer:
36 boys are going on the trip
Step-by-step explanation:
given data
total students = 48
girls = One-fourth
to find out
How many boys are going on the trip
solution
first we find One-fourth part of total students
so total girls are One-fourth that mean = 
girls =
= 12
if there 12 girls so remaining are boys
so boys are = total students - girls
boys = 48 - 12
boys = 36
so 36 boys are going on the trip