3. On the given probability scale, insert each of the following events at appropriate points. Indicate the chance of each event using one of the following terms: certain, likely, unlikely, impossible. a. Mathematics will be taught in secondary schools. b. In the future most cars will run without LPG or petrol.

Mathematics being taught in secondary schools is certainly a guaranteed event—we can confidently say it's certain! Almost every school across the globe includes math in their curriculum, making it a staple of education. As for most cars running without LPG or petrol in the future, that one is still up in the air! While there's a growing trend towards electric and alternative fuel vehicles, we're not quite at the point where we can say it's likely. It feels more like an ambitious possibility, tilting toward likely, but not guaranteed just yet.