The graph to the right is the uniform probability density function for a friend who is \( \times \) minutes late. (a) Find the probability that the friend is between 15 and 20 minutes late. (b) There is a \( 50 \% \) probability the friend will arrive within how many minutes? (a) The probability that the friend is between 15 and 20 minutes late is (Type an integer or a decimal. Round to three decimal places as needed)

Probability involving one die or choosing from n distinct objects A bag contains seven tiles labeled \( B, C, D, E, F, G \), and \( H \). One tile will be randomly picked. What is the probability of picking a vowel? Write your answer as a fraction in simplest form.

Question A professor gives a surprise quiz with one multiple choice question. There are 4 answer possibilities: B, C, and D. What is the probability that you randomly guess and select the correct answer? Give your answer as a fraction.

A six-sided die with sides labeled 1 through 6 will be rolled once. Each number is equally likely to be rolled. What is the probability. of rolling a number greater than 2 ? Write your answer as a fraction in simplest form.

1 Para crear una prueba, un profesor tiene un banco de 50 preguntas. Si de ellas escogerá 20. ¿de cuántas formas puede crear la prueba? \( =50 \) \( =20 \)

In an aquarium, there are 7 large fish and 6 small fish. Half of the small fish are red. One fish is selected at random. Find the probability that it is a small, red fish. Write your answer as a fraction in simplest form.