Yes,you are correct. The first van carries 8 people. The second van carries 8 people. The 3rd van carries the remaining 4 people. 8+8+4=20
To transport 20 people using vans that each seat 8, you will need 3 vans in total. Two vans will carry 16 people and the third will hold the remaining 4. Thus, rounding up from 2.5 gives us a total of 3 vans required.
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