The probability that Colin buys a sandwich is 0.3. The probability that Colin gets the bus is 0.9.
Assuming the events are independent, what is the probability that Colin buys a sandwich and gets the bus?

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years