A stationery shop sells red pens and blue pens.
There are red pens sold in packs of 12 blue pens sold in packs of 5
On one day
the number of packs of:the number of packs ofred pens sold:blue pens sold=3:2 \begin{array}{ccc} \text{the number of packs of} & : & \text{the number of packs of} \\ \text{red pens sold} & : & \text{blue pens sold} \end{array} = 3 : 2 the number of packs ofred pens sold::the number of packs ofblue pens sold=3:2A total of 230 pens were sold.
Work out the number of red pens sold.
93 exam-style questions on OCR GCSE Maths Ratio. Each one has a worked solution and a mark scheme showing where the marks go.