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primary 5 | Maths
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at first 【before】
S : C : S+C = 2 : 1 : 3
C = 75÷3 = 25
S = 50 (Ans)
(b)
in the end 【after / left】
50-14 = 36
S:C=4:1 = 36:9
change of chocoalte
25-9 = 16 (Ans)
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