Beth is making fruit salad. She adds 5 grapes for every 2 strawberries. If she uses 20 strawberries, how many grapes will she use?

Answer 1

Beth adds 5 grapes for every 2 strawberries, so for every 1 strawberry, she adds 5/2 grapes.
Therefore, if she uses 20 strawberries, she will add 20 * 5/2 = 50 grapes. Answer: \boxed{50}.