The mean of 40 observations was 36. It was found later that an observation 34 was wrongly taken as 20. The corrected new mean is
Choose one:
A) 76.55
B) 36.35
C) 46.15
D) 16.05
E) 20
Explanation:   Correct Sum = (36 * 40 + 34 - 20)= 
<gadget id="calculator">(36 * 40 + 34 - 20)</gadget>
<output>1_454</output>
1454   Correct mean= = 1454/40= 
<gadget id="calculator">1454/40</gadget>
<output>727/20 = around 36.35</output>
36.35   Answer: 36.35
<result>B</result>
The mean of 40 observations was 36. It was found later that an observation 34 was wrongly taken as 20. The corrected new mean is