To find the answer to this question, I first divided the number of roses and daisies by the number of bouquets.
(10/5 and 15/5) This allowed me to find out that each bouquet needs 2 roses and 3 daises.
From here, I multiplied 2 by 3 and 3 by 3 to find out how many flower Leo would need for 3 bouquets.
Leo will need 6 roses and 9 daisies for 3 bouquets.