23 total studies 1=24 hr, 5=48 hr, and 17=72 hr what is the average # of days for a study

Please help me try to figure this out. How do I convert this to get the average number of days it takes to perform a study?

 

Thanks - Jarick
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1 Answer

Average=(1×1+5×2+17×3)/23=(1+10+51)/23=62/23=2.70 days approx. The hours have been converted into days.

62 days is the sum of all the study hours. 2.70 is the average number of study days.

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