What is the standard deviation of the weights of the 30 samples in a certain experiment?

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What is the standard deviation of the weights of the 30 samples in a certain experiment?

(1) The total weight of the 30 samples is 360 grams.
(2) Each of the 30 samples weighs 12 grams.



OA B

Source: GMAT Prep
Source: — Data Sufficiency |