math hw averages problem

User Generated

fghqrag1621

Mathematics

Description

In a set of seven numbers, the average of the first four is 15, and the average of the last three is 8. What is the average of all seven numbers?

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Explanation & Answer

ave = [4(15)+3(8)] / 7 
= (60+24)/7 
= 84/7 
= 12 

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