Question 681029
Three quarters of the students running a 100_ yard race finished with an average time of 16 seconds. The remaing 25percent of students finished with an average time of 12seconds.what was the average time overall?
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Average time = (total time)/(total people) = ((3/4)x*16 + ((1/4)x*12) / x
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= ((3/4)*16 + (1/4)*12) = 15 seconds
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Cheers,
Stan H.
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