The mean of 40 observations was 160. It was detected on rechecking that the value 165 was wrongly copied as 125. Find the correct mean.
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Answer:
correct mean=161
Step-by-step explanation:
= sum of observation /no. of observation=mean
= x/40=160
= x=160 x 40
= x=6400
= 6400-125
= 6275
= 6275+125
= 6440/40=161
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