Ms. Edwards and Ms. Bowen won equal ratios of ribbons that is 5 : 9
Solution:
We need to check if Ms. Edwards and Ms. Bowen won equal ratios of ribbons
Calculating ratio of ribbons for Ms. Edwards
Number of first-place ribbons won by Ms. Edwards = 10
Number of second-place ribbons won by Ms. Edwards = 18
So for Ms. Edwards,
Ratio of first-place ribbons : second place ribbons = 10 : 18 = 5 : 9
Calculating ratio of ribbons for Ms. Bowen
Number of first-place ribbons won by Ms. Bowen = 15
Number of second-place ribbons won by Ms. Bowen = 27
So for Ms. Bowen,
Ratio of first-place ribbons : second place ribbons = 15: 27 = 5 : 9
As ratio of first-place ribbons and second place ribbons for both Ms. Edwards and Ms. Bowen is 5 : 9 so we can conclude that Ms. Edwards and Ms. Bowen won equal ratios of ribbons.