Answer:
The estimate would be 400 passengers.
Explanation:
So first, you would add all those numbers together.
147 + 123 + 101 + 53 = 424
After you get your number you would round. The number i got was 424 so i would round down because if it was 50 and over i would round up, But is it was 50 and down you would round down.
So after rounding i got 400.
Hope this helps if this is how you would solve it.