Solve this without using calculator:
.
A bus with 17 passengers left Victoria Island to Lagos Island.
At NEPA, 6 passengers alighted the bus & 9
entered.
At NTA, 2 alighted and 4 entered.
At Adeola-Odeku, 11 alighted & 16 entered.
At Bony camp, 3 alighted & 5 entered.
At Checkpoint 6 alighted & 3 entered.
When they arrived Lagos Island, HOW MANY PEOPLE ARE IN THE BUS?