Question
Download Solution PDFWhile calculating average marks of 60 students, the two digits of original marks of a student are written reversed and thereby average of marks is increased by 0.6 Find the difference between the two digits of marks of the student?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCalculation
Let the correct number be 10x + y. Reversed = 10y + x
Difference = (10y + x) - (10x + y) = 9(y − x)
So, 9(y − x) = 36 → y − x = 4
Answer: 4
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