Brian gets pic 'n mix when at the cinema and makes his bag up with 3 types of sweet. He picks 3 times as many smarties as cola bottles. He also picks twice as many marshmallows as smarties. What proportion of the bag of sweets are cola bottles?
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1:10
Step-by-step explanation:
let cola bottles = x, smarties = 3x
& marshmallows = 2×3x = 6x
C : S : M = x : 3x : 6x = 1: 3 : 6
required proportion of cola bottles to bag of sweets
= 1 : (1+3+6) = 1 : 10
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