Mathematics
The mean of 100 observations is 40. It is found that an observation 53 was misread as 83. Find the correct mean.
Related Questions
Assertion (A): The mean of x1, x2 and x3 is m. Then the value of (x1 - m) + (x2 - m) + (x3 - m) = 0.
Reason (R): x1 + x2 + x3 = 3m
⇒ (x1 - m) + (x2 - m) + (x3 - m) = (x1 + x2 + x3) - 3m
A is true, but R is false.
A is false, but R is true.
Both A and R are true, and R is the correct reason for A.
Both A and R are true, and R is the incorrect reason for A.
The mean of 200 items was 50. Later on, it was discovered that two items were misread as 92 and 8 instead of 192 and 88. Find the correct mean.
Find the mean of 75 numbers, if the mean of 45 of them is 18 and the mean of the remaining ones is 13.