SOLUTION: The mean mass of a group of 10 students is 57kg. One student leaves the group. The mean mass of the remaining 9 students is 56kg. Calculate the mass of the student who left the gro

Question 1120890: The mean mass of a group of 10 students is 57kg. One student leaves the group. The mean mass of the remaining 9 students is 56kg. Calculate the mass of the student who left the group.
Answer by ikleyn(52858) (Show Source): You can put this solution on YOUR website!
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10*57 - 9*56 = 66 kilograms.

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