Anne has six balloons, one of which contains a prize. She randomly selects one of the balloons to give away but accidentally allows it to float away. If Anne randomly selects one of the five remaining balloons to give away, what is the probability that the chosen balloon will contain a prize?

A golf ball is selected at random from a golf bag. If the golf bag contains 8 yellow ​balls, 13 red ​balls, and 3 green ​balls, find the probability of the following event.   The golf ball is yellow or red.

A golf ball is selected at random from a golf bag. If the golf bag contains 12 brown balls, 9 yellow balls, and 3 orange balls, find the probability of the following event. The golf ball is brown or yellow.

You are dealt one card from a standard​ 52-card deck. Find the probability of being dealt three of clubs.

The mathematics department of a college has 6 male​ professors, 11 female​ professors, 10 male teaching​ assistants, and 12 female teaching assistants. If a person is selected at random from the​ group, find the probability that the selected person is a teaching assistant or a female.