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The mean age of 5 boys is equal to 9.8. Furthermore, the mean age of 15 girls is 10.2. The mean age of the 20 children together is equal to?

 
 Sep 14, 2021
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Mean is the average

 

b / 5 = 9.8      b = 49 years total

g/15 = 10.2    g = 153 years total

 

(49+153) / 20 = 10.1 mean

 
 Sep 14, 2021

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