Mean marks obtained by 100 students are estimated to be 40. Later on its is found that one value was read as 83 instead of 53. Find out the ''corrected'' mean.

Mean marks obtained by 100 students are estimated to be 40. Later on i

1.	Mean marks obtained by 100 students are estimated to be 40. Later on its is found that one value was read as 83 instead of 53. Find out the ''corrected'' mean.
Answer» <html><body><p></p>Solution :`barX=(sumX)/N` <br/> Or, `sumX=barXN` <br/> <a href="https://interviewquestions.tuteehub.com/tag/given-473447" style="font-weight:bold;" target="_blank" title="Click to know more about GIVEN">GIVEN</a>: `barX=<a href="https://interviewquestions.tuteehub.com/tag/40-314386" style="font-weight:bold;" target="_blank" title="Click to know more about 40">40</a>,N=100` <br/> `40=(sumX)/100` <br/> `:.sumX"(wrong)"=40xx100=4,000` <br/> <a href="https://interviewquestions.tuteehub.com/tag/correct-409949" style="font-weight:bold;" target="_blank" title="Click to know more about CORRECT">CORRECT</a> value = 53 <br/> Incorrect value=83 <br/> Correct <br/> `barX=(sumX"(Wrong)+(Correct value)-(Incorrect value)")/N` <br/> `=(4,000+53-83)/100` <br/> `=(3,970)/100=39.70` <br/> Thus, <a href="https://interviewquestions.tuteehub.com/tag/corrected-2547641" style="font-weight:bold;" target="_blank" title="Click to know more about CORRECTED">CORRECTED</a> Mean = 39.70.</body></html>