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primary 6 | Maths
| Data Analysis
2 Answers Below
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Date Posted: 4 years ago
Views: 227
Just come across this question...
I have different method for solution for your reference (Since the other two tutor using formula method, Average = Total / Number of people)
When 2 boys joined in, average become 65 and the total marks increased by 165 (from 2 boys)
The 2 boys with average 65 marks, total take away 2 x 65 = 130.
The balance marks = 165 - 130 = 35 take by all girls, each girls average increased 65-60 =5 marks
5 marks --> 1 girl
35 Marks ---> 7 girls.
Hope this helps
I have different method for solution for your reference (Since the other two tutor using formula method, Average = Total / Number of people)
When 2 boys joined in, average become 65 and the total marks increased by 165 (from 2 boys)
The 2 boys with average 65 marks, total take away 2 x 65 = 130.
The balance marks = 165 - 130 = 35 take by all girls, each girls average increased 65-60 =5 marks
5 marks --> 1 girl
35 Marks ---> 7 girls.
Hope this helps
See 2 Answers
done
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Hope you understand
Date Posted:
4 years ago
I dont really understand what u r doing
Haha ok. But you understand the suha’s answer?
Yes
Ok can! Mine is same as suha. Just mine no explanation. As long as you understand how to do then its fine! Sorry for not including explanation:)
It's okay her explanation make me understand but after seeing ur working now I understand. But thank you for the help:)
No problem:)
Thank you very much
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