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Mathematics 18 Online
OpenStudy (anonymous):

The average of 100 measurements is 23 and the average of 50 additional measurements is 27. Which quantity is larger? A. the average of 150 measurements B. 25

OpenStudy (anonymous):

25 is larger. you need to do [(100*23) + (50*27) ] / 150 which will give you 24.33333 which is less than 25.

OpenStudy (anonymous):

oh ok i did'nt know to add 50*27 thanks!

OpenStudy (anonymous):

no problem (:

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