The mean of 50 observation is 80 4 but later on it was found that 96 was mistake as 69 at one place find the correct mean find correct solution
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total obs= 4000
subtracting 96 from 4000 and adding 69 to it gives =3973
correct mean=79.46 ans
subtracting 96 from 4000 and adding 69 to it gives =3973
correct mean=79.46 ans
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