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Component Levels in Mixture

**How mixture made?**
**A**fter adding 1 spoon of **tea** into **coffee,** the levels of liquids in both cups must be** unequal.** Whatever now tea cup is missing is now in cup of coffee & mixed with coffee. The content of tea in the cup of coffee is certainly more.
Now after **taking** spoonful of the** mixture back to tea** cup the levels of the liquid in both cups would be same. Hence, whatever the** cup of tea** is** missing** is replaced by** coffee.** That** missing tea content** is now in the **cup of coffee** where it has replaced **some of coffee **content!

Suppose there are **100****0 molecules **in each cup i.e. of tea & coffee. Let's assume **100** molecules of tea are mixed to coffee using spoon. Now, coffee cup will have **1100** molecules and tea will have **900** molecules. Obviously, right now the cup of coffee contains **more** tea (100 molecules) that coffee in cup of tea (0 molecules)!
Now while taking 100 molecules back from mixture having 1100 molecules, suppose** 70** molecules of coffee & **30** of tea are taken. That means, exactly 100 - 30 = 70 molecules of tea left in mixture. That 70 + 30 molecules mixture is poured into cup of tea. That is exact 70 molecules of coffee mixed in tea.
What does it mean? **70** molecules of **coffee** have displaced **70** molecules of **tea** into cup of **coffee** maintaining level of both the liquids.
We can say other way as well. **30** molecules of **tea** displaced **30** molecules of coffee into cup of **tea** while maintaining levels of both the liquids same.
So the answer is both have **same** level of contents mixed.
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