govbledobnle govbledobnle
  • 26-02-2022
  • Mathematics
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Please HELP ME !!!!!

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Medunno13
Medunno13 Medunno13
  • 26-02-2022

Answer: C

Step-by-step explanation:

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

So standard deviation [tex]=\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[/tex]

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