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primary 6 | Maths
| Ratio
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Date Posted: 5 years ago
Views: 395
total score of X, Y & Z
= 249 x 3 = 747
Z's score = 749 - 492 = 255
total score of Y & Z
= 228 x 2 = 456
X's score = 747 - 456 = 291
total score of X & Z
= 291 + 255 = 546
average of X & Z = 546/2 = 273
= 249 x 3 = 747
Z's score = 749 - 492 = 255
total score of Y & Z
= 228 x 2 = 456
X's score = 747 - 456 = 291
total score of X & Z
= 291 + 255 = 546
average of X & Z = 546/2 = 273
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