Here it is-
Alice and Bob play a card game. Alice wins 70% of the time and there are no ties. If they play 5 games what is the probability that Alice wins at least three more games than Bob?
My answer:
5C4 * (1/7)
+
5C5 * (1/7)
It doesnt seem 100% correct, but Im not too sure here...all help is appreciated!