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

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by BTGmoderatorDC » Mon Dec 13, 2021 2:00 pm

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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

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Source: Beat The GMAT — Data Sufficiency | Mon Dec 13, 2021 2:00 pm

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