Question

Seven different models cars, from which there are three blue and four red, are to be parked in a row. Find how many different arrangements there are if no two cars of the same color are to be parked next to each other.

Answer 1

It would be 144

Explanation:

4 x 3 x 3 x 2 x 2 x 1 x 1

r b r b r b like that