For every cycle of picks Sweet T has she gets 2 orange and 5 green. 2+5=7. To find how many cycles there are divide 25/7= 3 Remainder:4. To mind how many orange then do 3 times 2(2 for each cycle)=6.
The reason I say 6 or <u><em>10</em></u> is that you could add 2 oranges from the remainder to the total # of oranges.