Since this problem is a ratio that also gives a total, setting up equivalent ratios in a table with the total would be a good way to find the answer. Since there is 1 orange pick for every 2 green picks and there are a total of 12 picks, we can set up the following:
Orange 1 2 3 4 5
Green 2 4 6 8 10
Total 3 6 9 12 15
You can see from the table, that when there are 12 total picks, 4 of them are orange and 8 of them are green.
