The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 21. The corrected new mean is :	Options
A) 36.54
B) 36.58
C) 36.23
D) 36.14
E) 36.81
Explanation:   Correct Sum = (36 * 50 + 48 - 21)= 
<gadget id="calculator">(36 * 50 + 48 - 21)</gadget>
<output>1_827</output>
1827.   Correct mean= = 1827/50= 
<gadget id="calculator">1827/50</gadget>
<output>1_827/50 = around 36.54</output>
36.54   36.54nswer: 36.54) 36.54
<result>A</result>
The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 21. The corrected new mean is :