Can anyone tell me the statements and reasons for this?

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

The krasnapolski is a top-of-the-line hotel in amsterdam, the netherlands. among their many services, they rent bicycles to guests. the bicycle checkout is open 24 hours per day 7 days per week and has 50 bicycles on hand. on average, 10 guests request a bicycle each day, arriving completely randomly at all times of the day during the spring and summer seasons. guests keep bicycles for four days on average, with a standard deviation of two days. how long does a guest on average have to wait for a bike? a. approximately 24 hours b. approximately 0.033 hours c. approximately 4 days d. approximately 47 minutes

Hey free points ! people i have a few math questions on my profile consider looking at them i have to get done in 30 mins!