Math, asked by rini4, 1 year ago

the mean of 9 observation was found to be 35 letter on it was discovered that an observation 81 was misread as 18 find the correct mean of observation

Answers

Answered by Tanya107

sum of observations=9x35
. =315
correct mean=(sum of observations- incorrect value+correct value)upon no. of observations
. =(315-18+81)upon 9
. =42
ans. is 42

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