Question

On finding mean of ungrouped data

9.The mean weight of 4 members of a family is 60kg. Three of them have the weight 56kg,68kg and 72kg. Find the weight of the fourth number.

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Answer 1

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Answer 2

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Plaster of Paris should be stored in moisture-proof container because moisture can affect plaster of Paris by slowing down the setting of the plaster because of hydration. This will turn plaster useless...