A new Volleyball coach has just been hired by a group of middle school club teams to coach them throughout the season. At his first practice, he picks 20 of the players at random and asks them to serve the ball over the net. Only 13 of the 20 serves made it over the net.
If the coach spends the rest of practice watching the players serve, how many serves can he expect to be successful out of 100? HELP ME PLEASE AND THANK U!