math hw averages problem

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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?

Oct 21st, 2017

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

please choose me best 

Sep 16th, 2014

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