Ratio is 6:5
6+5=11
Men: 6 parts of 11 = 3600
6=3600
1=x
X=3600/6
=600.
Women: 5 parts of 11
1 part = 600
5 parts = 600x5
=3000
Your answer is 3/2 i know for a fact
There are no tanks with less than 30 fish, so the first two groups ( 20-24) and (25-29) aren't used.
There are 3 tanks with 30-34 fish.
There are 3 tanks with 35-39 fish.
There are 3 tanks with 40-44 fish.
There are 1 tanks with 45-49 fish.
Now drag the bars for each group to the number of tanks.
See attached picture: