Can someone provide an example for the "Firing into Combat" rule on p. 224 of the Basic Roleplaying core rulebook? It says that firing into combat incurs a 20% penalty, but in the next paragraph, it says "The chance of hitting a particular target is divided equally by the total number of beings in the melee. If the attacker rolls a number between his or her skill rating and the chance modified (as above) for shooting into melee, the GM should randomly determine which of the targets was struck, by rolling randomly with an equivalent die roll, or by asking all potential targets to make a Luck roll and choosing the biggest failure.
Why does the player divide the chance of hitting if the GM will determine afterwards who was hit with a die roll, and vice versa? Am I mis-reading something? I'm not seeing this rule for some reason.