(b) The mean weight of seven people is 61kg. Another person joins the group and the
mean falls to 59kg. Calculate the weight of the eighth person.
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Answer:
The weight of the eighth person is 45
Step-by-step explanation:
Total weight of seven persons is 61×7 = 427kg
Total weight of eight persons is 59×8= 472kg
Therefore, the weight of the eighth person is 472 -427 = 45 kg
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