The mean of 50 observations was 36. It was found later that an observation 29 was wrongly taken as 23. The corrected new mean is :  Options:
A) 36.1 B) 36.5 C) 36.22 D) 36.12 E) 36.18
Explanation:   Correct Sum = (36 * 50 + 29 - 23)= 
<gadget id="calculator">(36 * 50 + 29 - 23)</gadget>
<output>1_806</output>
1806.   Correct mean= = 1806/50= 
<gadget id="calculator">1806/50</gadget>
<output>903/25 = around 36.12</output>
36.12   Answer: 36.12) 36.12
<result>D</result>
The mean of 50 observations was 36. It was found later that an observation 29 was wrongly taken as 23. The corrected new mean is :