Answer: There are 12 pink roses and 7 yellow roses.
Step-by-step explanation:
Since we have given that
Total number of members = 19
Let the number of pink roses be x
Let the number of yellow roses be 19-x
Cost of pink roses be $3
Cost of yellow roses be $2
Total amount spend to buy = $50
According to question,

Hence, Number of pink roses be 12
and number of yellow roses be

Hence, there are 12 pink roses and 7 yellow roses.