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Question
primary 5 | Maths
| Whole Numbers
2 Answers Below
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Hi Pls assist, thanks!
Date Posted: 6 years ago
Views: 439
Don't have to use algebra.
For each student whose score was removed, difference between new average and his score = 73-68 =5
Since 4 students taken out, total difference = 5x4 =20
Difference between new and old average = 73-71=2
Therefore no. of students at first =
20/2 =10
For each student whose score was removed, difference between new average and his score = 73-68 =5
Since 4 students taken out, total difference = 5x4 =20
Difference between new and old average = 73-71=2
Therefore no. of students at first =
20/2 =10
Thanks Phylicia!
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done
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Depends on whether school allows algebra
Date Posted:
6 years ago
Thanks Javier!
done
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Hi, i was previously too lazy to give a very detailed solution and explanation. Hope this helps. The short cut is already given in my previous comments. All the best in your studies!
Date Posted:
6 years ago
Thanks a lot, Phylicia!
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