RIRI7212 RIRI7212

06-03-2024
Mathematics

contestada

The average weight of 35 boys is 80 kg with a standard deviation of 4 kg, while the average weight of 65 girls is 70 kg with a standard deviation of 3 kg. What is the standard deviation of boys and girls taken together?

a) 3.5 kg
b) 3.8 kg
c) 4.0 kg
d) 4.2 kg

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