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23-03-2017
Mathematics

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Jamila babysat nine times. She earned $15, $20, $ 10, $ 12, $20, $16, $80 and $18 for eight babysitting jobs. How much did she earn the ninth time if the mean of the data set is $24?

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23-03-2017

15 +20=35
35+10=45
45+12=57
57+20=77
77+16=93
93+80=173
173+18=191
24*9=216
216-191=25

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