A business person buys potatoes of two different varieties \(P\) and \(Q\), mixes them in a certain ratio and sells them at ₹ 192 per kg.
The cost of the variety \(P\) is ₹ 800 for 5 kg.
The cost of the variety \(Q\) is ₹ 800 for 4 kg.
If the person gets 8% profit, what is the \(P:Q\) ratio (by weight)?