Answer:
5:7
Step-by-step explanation:
First you have to find the watermelons owned by the three of them.
Let's take Susan as 'x'
According to the question:
1. Alex has twice the watermelons as Susan -> 2x
2. Amy has 6 more watermelons than Susan -> x+6
The sum of the watermelons is 66
SO,
x + 2x + x + 6 = 66
4x = 60
x = 15
Susan has 15
Alex has 30
and Amy has 21
Now we do the ratio:
Susan : Amy
15 : 21
5 : 7
