You know that:
- They took 5 cars and each car had 4 people.
- They took 3 vans and each van had 7 people.
Then, you can set up the following expression:
[tex](5)(4)+(3)(7)[/tex]Now you to solve the Multiplications:
[tex]=20+21[/tex]And finally, you can solve the Addition:
[tex]=41[/tex]Therefore, the answer is: Option D.