How many disciples left before the pentecost day?

Before Pentecost, a total of 11 disciples remained after Judas Iscariot's betrayal and subsequent death. Initially, Jesus had 12 disciples, but Judas's actions led to his departure from the group. After Jesus' resurrection, the remaining 11 disciples were tasked with spreading his teachings, culminating in the events of Pentecost when they received the Holy Spirit.