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Mathematics, 04.06.2020 19:15 yialefi

the mean mass of 30 pupils is 50kg. two pupils joined the class and the masses of these two are 49kg and 47kg respectively. find the new mean collect to. one decimal place. help me please

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the mean mass of 30 pupils is 50kg. two pupils joined the class and the masses of these two are 49kg...

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