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# Stuck on a ratio maths problem watch

1. A certain preparation consists of liquids x, y and z in the proportion 3: 2: 1

How many millilitres of the preparation can be made from a stock of materials consisting of 18 millilitres of x, 10 millilitres of y, and 5 millilitres of z?

2. (Original post by jaffacakes101)
A certain preparation consists of liquids x, y and z in the proportion 3: 2: 1

How many millilitres of the preparation can be made from a stock of materials consisting of 18 millilitres of x, 10 millilitres of y, and 5 millilitres of z?

The ratio must be 31 so e.g. you could have 6ml of x, 4ml of y and 2ml of z.

So that would give you 12ml of preparation.

But that's not the maximum. What's the largest amount you could make?

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Updated: January 23, 2016
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