the mean of 7 observation is 32 if one Observation 48 is added to this then the new mean is
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the new mean is 28.857
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48+7x÷7=32
here 7 is cancelled from numerator and denominator
so,
48+x=32
1.5=x
here 7 is cancelled from numerator and denominator
so,
48+x=32
1.5=x
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