Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test Quantitative Aptitude Elementary Statistics
The mean of 100 observations is 50 and their standard deviation is 5. The sum of all squares of all the observations is
1
50000
2
250000
3
252500
4
More than one of the above
5
None of the above