Please HELP ME !!!!!

Jeroen Bouman asked May 1, 2023

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3 votes

Jeroen Bouman asked May 1, 2023

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14 votes

Answer: C

Explanation:

Mean is 10(.27)+20(.28)+30(.45) = 21.8

So standard deviation
$=\sqrt{(10-21.8)^(2) \cdot 0.27+(20-21.8)^(2) \cdot 0.28+(30-21.8)^(2) \cdot 0.45} \approx 8.29$

Noni answered May 5, 2023

by Noni

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