in a group of 120 students, 68 had ridden a bus, 78 had ridden the LRT, 33 had ridden a jeeo, while 40 had ridden both the bus and LRT, 20 had had ridden the bus and jeep, 19 had ridden the LRT and the jeep and 15 had ridden the bus the LRT and the jeep .
a.howmany had ridden the bus only?
b.how many had ridden the LRT only?
c.how many did not ride on any of the three modes transportation?


yung dito po yung pinakakailangan ko

*can you explain the numbers.​