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CBSE Notes 2011-2012

Mean of 100 items is 49. It was discovered that three items which should have been 60, 70, 80 were w...

Multiple choice question

Mean of 100 items is 49. It was discovered that three items which should have been 60, 70, 80 were wrongly read as 40, 20,50 respectively. The correct mean is

unknown

48

unknown

49

unknown

50

unknown

60