Very good! You had \(10\) to begin with, you gave away \(4\). But, obviously,

**in total**, there are still \(10\) chocolates. So, chocolates only**changed hands**.Imagine there are two cars travelling at \(40 \, \mathrm{km/h}\). They are travelling in opposite directions and unfortunately crash into each other and stop moving. Before they crashed, if you added their speeds, you would get \(40 + 40 = 80 \, \mathrm{km/h}\).

**After**the crash, what is true about the

**sum**of their speeds?

- It is \(< 80 \, \mathrm{km/h}\)
- It is \(= 80 \, \mathrm{km/h}\)
- It is \(> 80 \, \mathrm{km/h}\)