In a group of 120 students,68 had riddena bus,78 had ridden the LRT,20 had riddenthe bus and the jeep ,19 had ridden the LRT and the jeep and 15 had ridden the bus, the LRT and the jeep. a. how many had ridden the bus only?

I believe the answer is 33

20+15=35 >> 68-35=33

So, their are 120 students (irrelevant)
78 rode the LRT (irrelevant)
68 rode the bus (relevant)
20 rode the bus and Jeep (relevant)
19 rode the jeep and LRT (irrelevant)
15 rode all three (relevant)
So; Out of the 68, 35 rode on something else>>to get the answer you would take 35 away from 68 and get 33
Hope this helped...

Idon’t know but you’ll figure it out