Can someone explain in a clear way.? Thks

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primary 6 Maths Singapore

Can someone explain in a clear way.?
Thks

Date Posted: 3 years ago

Snell

3 years ago

D: 10
E: 30
F: 1u
avg = 1u/3 + 40/3

1u + 4 = 1u/3 + 40/3
3u + 12 = 1u + 40
1u = 28/2 = 14

total = 68

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Date Posted: 3 years ago