The mean of 50 observations was 36. it was found later an observation 48 was wrongly taken as 23 . the corrected new means is :  Choose the correct choice from the following answers
A) 35.2 B) 36.1 C) 36.5 D) 39.1 E) None of these
Solution   Correct sum = (36 × 50 + 48 - 23) = 1525.   ∴ correct mean = 1825/50= 
<gadget id="calculator">1825/50</gadget>
<output>73/2 = around 36.5</output>
36.5 Answer 36.5
<result>C</result>
The mean of 50 observations was 36. it was found later an observation 48 was wrongly taken as 23 . the corrected new means is :