The average marks in Science subject of a class of 20 students is 68. If the marks of two students were misread as 48 and 65 of the actual marks 72 and 61 respectively, then what would be the correct average ? ?->(Show Answer!)

1. The average marks in Science subject of a class of 20 students is 68. If the marks of two students were misread as 48 and 65 of the actual marks 72 and 61 respectively, then what would be the correct average ?

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By: anil on 05 May 2019 01.35 am

Number of students = 20 Average marks = 68 Total marks in science = 20 x 68 = 1360 It is given that two students were misread as 48 and 65 of the actual marks 72 and 61 respectively So new total will be 1360-(48+65)+(72+61) = 1380 Correct average = $$frac{1380}{20}$$ = 69

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