The average age of 9 members in an office team is 45 years. The age of retirement in that office is 60 years. One member is retired and replaced by a member of age 33 years. What is the effect of retirement on the average age of the team?
1
Increase by 3 years
2
Decrease by 4 years
3
Increase by 4 years
4
Decrease by 3 years
5
No effect on average