Nicole is making tuna salad for her office colleagues. It takes 2/5 of a pound of canned tuna to make 5 portions of salad. She uses 1 1/5 pounds of canned tuna for every 2 onions used.
If Nicole uses a total of 4 onions, then how many portions of salad does she make?
First, let's calculate how much canned tuna Nicole uses for 4 onions.
Since she uses 1 1/5 pounds of tuna for every 2 onions, for 4 onions, she will use:
1 1/5 * 2 = 2 2/5 pounds of tuna
Next, let's calculate how many portions of salad Nicole can make with 2 2/5 pounds of tuna.
If 2/5 of a pound of tuna makes 5 portions of salad, then 2 2/5 pounds of tuna will make:
(2 + 2/5) / (2/5) * 5 = (12/5) / (2/5) * 5 = 12 portions of salad
Therefore, Nicole can make 12 portions of salad for her office colleagues.