Answer: 4 yellow roses
solution:
Since Colise has 2 vases of flowers that each hold 10 red and 5 yellow roses, the total number of roses Colise has is as following.
2*(10+5)=30
Michele has 3 vases and each vase has 6 red roses, therefore the total number of red roses Michele has is as following
3*6 = 18
Therefore, the total number of yellow roses Michele has is as following
30-18=12
Since Michele has 3 vases, each vase has 4 yellow roses(∵12/3=4)
∴answer: 4 yellow roses
