A group of 40 employees of Cadre A has a mean age of 31. A different group of 60 employees of Cadre B has a mean age of 28. What is the mean age of two employees of the two groups together?

A group of 40 employees of Cadre A has a mean age of 31. A different g

1.	A group of 40 employees of Cadre A has a mean age of 31. A different group of 60 employees of Cadre B has a mean age of 28. What is the mean age of two employees of the two groups together?
A.	29.8
B.	29.5
C.	29.2
D.	29
Answer» D. 29