Answer:
A=62 B=93 C=155
Explanation
You first add all the ratios and get 10.
To get the first ratio you write down 2/10 ×310/1 then you will get 31 ×2 you get 62
For you to get the second ratio now you do the same as the first ratio 3/10×310/1= 31 ×3 you get 93.
You do the same for the third ratio.
5/10×310/1= 31×5 you will get 155.
This is how you solve it. Sometimes you could get 4 or 5 ratios but what does not change us how you work the answer. This applies to every ratios.