While tabulation of marks scored in an examination by the students of a class, by mistake the marks scored by one student got recorded as 93 in place of 63, and thereby the average marks increased by 0.5. What was the number of students in the class?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 60
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Understanding |
Application |
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Diffirence of 30 marks increase the average by 0.5 marks |
Hence the total number of students is = 30 × 0.5 = 60 |