1. A bus company has a large number of buses. 25% of the buses are more than 10 years old.

If a bus is more than 10 years old, the probability that it will start first time is 0.3.
If a bus is less than 10 years old, the probability that it will start first time is 0.65.

Amir is asked to drive one of the company’s buses, chosen at random.

Calculate the probability that the bus starts first time.