Question:
Why did Jesus choose 12 disciples?

Answer:

Jesus chose these men so that He could teach them.  They were able to help Him in His ministry and faithfully carry out His Word after His death and resurrection.  “He said to them, “Go into all the world and preach the gospel to every creature” (Mark 15:16, NKJV).

The Spirit of God gives four reasons that He chose the apostles: “He appointed twelve, (1) that they might be with Him and (2) that He might send them out to preach, and (3) to have power to heal sicknesses and (4) to cast out demons” (Mark 3:14, 15, NKJV).

The number “twelve” in Scripture indicates responsibility…there were 12 tribes of Israel.  The Lord knew all about Judas (John 6:70), but chose him that the Scriptures might be fulfilled. (Edited).