Discuss Forum

1.

A student's marks were wrongly entered as 83 instead of 63. Due to the error the average marks for the class got increased by 0.5. Find the number of students in the class.

  • A. 10
  • B. 10
  • C. 10
  • D. 10

Answer: Option C

Explanation:

 নম্বর বেশি=83-63=20 প্রশ্নমতে, 0.5 অংশ বৃদ্ধি =20  1 অংশ বৃদ্ধি = 200.5=40 ছাত্র= ছাত্রীর সংখ্যা=40

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