In a group of 120 students,68 had ridden a bus,78 had ridden the LRT,33 had ridden a jeep,19 had ridden the LRT and the jeep and 15 had ridden the bus, the LRT and the jeep.

GUIDE QUESTION:
a. How many had ridden the bus Only?
b. how many had ridden the LRT only?
c. How many had ridden the jeep only?
d. How many did not ride on any of the three modes of transportion?

Pa help po, salamat (sana mapansin ng modertors :))​