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karthikasokan16
@karthikasokan16
June 2021
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The mean of 40 observations was 200. It was detected by rechecking that the value of 65 was wrongly copied as 25 for computation of mean. Find the corrected mean.
Answers & Comments
Sandeep03edu
Mean = 40 for 200 observation
then sum of observation = 40*200 = 8000
given 65 is wrong copied as 25 then
we remove 65 and add 25
thus
sum.of observation = 8000 - 65 + 25 = 7960
thus new mean will be
new mean = 7960/40 = 199
Plz mark as BRAINLIST if this answer deserves it
20 votes
Thanks 24
karthikasokan16
yep you deserve it but only if two persons answer it i can mark you as the brainliest so sorry
Sandeep03edu
why if 2 person answer do u not sure about my answer
Amirverma
My friend your answer is incorrect.
Sandeep03edu
no its correct
Amirverma
Mean of 40 observation is 200.
9 votes
Thanks 9
karthikasokan16
good try my friend but your answer is wrong
Amirverma
65 was wrongly copied as 25 so we subtract 25 and add 65?
Amirverma
My answer is correct.
Amirverma
I have confirmed
Amirverma
Marks as brainliest andwer pls
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Answers & Comments
then sum of observation = 40*200 = 8000
given 65 is wrong copied as 25 then
we remove 65 and add 25
thus
sum.of observation = 8000 - 65 + 25 = 7960
thus new mean will be
new mean = 7960/40 = 199
Plz mark as BRAINLIST if this answer deserves it