I assume the fruits don't have to be different (you don't say one way or the other so I assume so).

There are 10 fruit altogether and you want to choose 2: .

Two methods:

1. If there'snooranges then you are choosing 2 fruit from 7: . So the number of combinationswithoranges will be .

2. (Choose 1 orange from 3 and 1 non-orange from 7) + (Choose 2 oranges from 3 and 0 non-orange from 7): .

Both methods obviously give the same answer.