A student scores the following marks in five tests: 45, 54, 41, 57, 43. His score is not known for the sixth test. If the mean score is 48 in the six tests, then the standard deviation of the marks in six tests is:

A student scores the following marks in five tests: 45, 54, 41, 57, 43

1.	A student scores the following marks in five tests: 45, 54, 41, 57, 43. His score is not known for the sixth test. If the mean score is 48 in the six tests, then the standard deviation of the marks in six tests is:
A.	\(\frac{10}{\sqrt{3}}\)
B.	100/3
C.	10/3
D.	\(\frac{100}{\sqrt{3}}\)
Answer» B. 100/3