How many people were in the upper room on the day of Pentecost?

Acts 1:15 notes that there were approximately 120 people present in the Upper Room on the day of Pentecost. Jesus and his disciples accounted for a dozen with the rest being believers. According to the Bible, some of the female followers of Jesus and his mother were also present.

During the Upper Room meeting on the day of Pentecost, the assembled were called upon to vote for a replacement disciple for Judas, the man who betrayed Christ, leading to his crucifixion. The 120 men counted as present in the Upper Room is believed to have accounted for the 70 evangelists recognized by Christ.