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primary 5 | Maths
| Whole Numbers
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Date Posted: 5 years ago
Views: 330
A and B scored an average of 15 marks
A and C scored an average of 18 marks
B and C scored an average of 20 marks
This means that
A and B scored a total of 30 marks
B and C scored a total of 36 marks
A and C scored a total of 40 marks
Adding all these together,
“2 Abby, 2 Betty and 2 Claire” scored a total of 106 marks.
So “two groups” of Abby, Betty and Claire scored a total of 106 marks.
This means that Abby, Betty and Claire scored a total of 53 marks.
But remember that Abby and Betty scored a total of 30 marks.
Claire’s score
= 53 - 30
= 23
A and C scored an average of 18 marks
B and C scored an average of 20 marks
This means that
A and B scored a total of 30 marks
B and C scored a total of 36 marks
A and C scored a total of 40 marks
Adding all these together,
“2 Abby, 2 Betty and 2 Claire” scored a total of 106 marks.
So “two groups” of Abby, Betty and Claire scored a total of 106 marks.
This means that Abby, Betty and Claire scored a total of 53 marks.
But remember that Abby and Betty scored a total of 30 marks.
Claire’s score
= 53 - 30
= 23
See 1 Answer
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Here you go! Hope this helps!
Date Posted:
5 years ago
Thank u
No problem! :)
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