Colise : 2 vases...each hold 10 red and 5 yellow.....2(15) = 30 roses total.
Michele also has 30 roses. She has 3 vases...each vase has 6 red roses....6 * 3 = 18 red roses. That leaves 30 - 18 = 12 yellow roses. And I am assuming that each vase has the same number of roses.....in that case, 12/3 = 4 yellow roses per vase
