1. The average marks of 45 students is shown as 65. It includes a wrong entry of 84 marks instead of 48 marks. The correct average is:
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By: anil on 05 May 2019 02.15 am
Total marks of 45 students = 45 $$ imes$$ 65 = 2925 Replacing 84 by 48 in the data, => Total marks = 2925 - 84 + 48 = 28897 => Correct average = $$frac{2889}{45} = frac{321}{5} = 64.2$$ => Ans - (D)
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