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Standard VIII
Mathematics
Mean
If the mean o...
Question
If the mean of 100 observations is 50, then the sum of all the observations is ______________.
A
5260
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B
5000
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C
5050
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D
5105
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Solution
The correct option is
B
5000
Option (a) is correct.
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The mean of 100 observations is 50 and their standard deviation is 5. The sum of all squares of all the observations is
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