The mean of five observations is 5 and their variance is 9.20. If three of the given five observations are 1, 3 and 8, then a ratio of other two observations is:

The mean of five observations is 5 and their variance is 9.20. If thre

1.	The mean of five observations is 5 and their variance is 9.20. If three of the given five observations are 1, 3 and 8, then a ratio of other two observations is:
A.	10 : 3
B.	4 : 9
C.	5 : 8
D.	6 : 7
Answer» C. 5 : 8