The average of a set of 20 values is 15.8. The mean increases by 0.4 when a value is added to the set. Then the new value is:

The average of a set of 20 values is 15.8. The mean increases by 0.4 w

1.	The average of a set of 20 values is 15.8. The mean increases by 0.4 when a value is added to the set. Then the new value is:
A.	24.2
B.	20.4
C.	15.8
D.	22.4
Answer» B. 20.4