Question
Abhishek's marks in Mathematics were incorrectly entered
as 93 instead of 63. Due to this, the average marks of the class in Mathematics got increased by 0.5. How many students were there in the class?Solution
Increase in total marks = 93 - 63 ⇒ Increase in total marks = 30 Number of students = Increase in total marks / Increase in average ⇒ Number of students = 30 / 0.5 ⇒ Number of students = 60
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