Answers

2015-03-05T19:16:52+05:30
X+y+........................+74/36=12
x+y+..........................+47/36=x+y+..................+74-27/36=
x+y+......................74/36-27/36=12-3/4=45/4
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2015-03-05T19:29:45+05:30
Mean=Sum of observations/Total no of observations 12=Sum/36 Sum=12*36=432 Since, 47 was misread as 74 So, the correct Sum=432-74+47=405 Mean=11.25
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