Shamsh H.

asked • 06/25/19# Mean and Percentage

5 million students appeared in an exam.

The total marks of the exam were 9.0.

Mean score of male candidates: 5.55/9.0

Mean score of female candidates: 5.66/9.0

How many students or what percentage of students scored 7.5?

Can someone help me with this?

## 1 Expert Answer

Deron P. answered • 06/27/19

Patient Tutor with Exceptional Ability to Transfer Knowledge.

Hi Shamsh,

I'd be glad to help, but you need more information. You need to include the standard deviation for the both the male candidates and the female candidates.

Thanks,

DRP

Shamsh H.

Thank you very much for your reply. This is a real-case scenario. It's about the IELTS examination where I was one of the test takers. 5 million students appeared in an exam. The total marks of the exam were 9.0. Mean score of male candidates: 5.55/9.0 Mean score of female candidates: 5.66/9.0 Mean score of male and female candidates: (5.55+5.66)/2= 5.60. As we know, that IELTS exams markings are in terms of 0.5. Therefore, any student appeared in the exam could have got - 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0. How many students or what percentage of students scored 7.5?06/27/19

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Shamsh H.

Thank you very much for your reply. This is a real-case scenario. It's about the IELTS examination where I was one of the test takers. 5 million students appeared in an exam. The total marks of the exam were 9.0. Mean score of male candidates: 5.55/9.0 Mean score of female candidates: 5.66/9.0 Mean score of male and female candidates: (5.55+5.66)/2= 5.60. As we know, that IELTS exams markings are in terms of 0.5. Therefore, any student appeared in the exam could have got - 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0. How many students or what percentage of students scored 7.5?06/27/19