The mean of 100 observations is 50.5. The sum of all the observations is:

5000

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5050

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5005

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5105

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Solution

The correct option is B
5050

$M e a n = \frac{S u m o f a l l t h e o b s e r v a t i o n s}{N u m b e r o f t h e o b s e r v a t i o n s}$

So, $50.5 = \frac{S u m o f a l l t h e o b s e r v a t i o n s}{100} ⟹ S u m o f a l l t h e o b s e r v a t i o n s = 50.5 \times 100 = 5050$

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