There are only three active stations in a slotted ALOHA network: A$,$ B$,$ and C$.$ Each station

generates a frame in a time slot with corresponding probabilities p$\_($A$)=0\mathrm{.}2,$p$\_($B$)=0\mathrm{.}3,$ and p$\_($C$)=$S$=$p$*(1-$p$)^($N$-1)$