The chance to hit runner runner flush cards is this:
10 cards out of 47 must hit - then 9 cards out of 46 must hit. You could state this mathematically as 9/46th of 10 outs on the turn - that's 1.95 outs.

You can say that your 10 immediate outs are 'good' outs 1.95 outs of the time (to a better draw, not a made hand) and 'bad' outs 8.05 outs of the time.