# Probability

(1) A jar contains 4 blue, 5 green, and 6 red marbles. If a marble is selected at random, what is the probability that it is either green or red?

• (a) $$\frac{5}{15}$$
• (b) $$\frac{11}{15}$$
• (c) $$\frac{4}{15}$$
• (d) $$\frac{9}{15}$$

(2) A six-sided die is rolled once. What is the probability that the number rolled is an even number greater than 3?

• (a) $$\frac{1}{6}$$
• (b) $$\frac{1}{3}$$
• (c) $$\frac{1}{2}$$
• (d) $$\frac{2}{3}$$

(3) In a class of 30 students, 18 play basketball, and 16 play football. If 12 students play both sports, what is the probability of selecting a student at random who plays either basketball or football?

• (a) $$\frac{22}{30}$$
• (b) $$\frac{22}{30}$$
• (c) $$\frac{18}{30}$$
• (d) $$\frac{24}{30}$$

(4) Two cards are drawn at random from a deck of 52 cards without replacement. What is the probability of drawing an ace followed by a king?

• (a) $$\frac{1}{132}$$
• (b) $$\frac{4}{663}$$
• (c) $$\frac{1}{221}$$
• (d) $$\frac{1}{26}$$

(5) A bag contains 3 red, 2 blue, and 5 green balls. Two balls are drawn randomly. What is the probability that they are not of the same color?

• (a) $$\frac{21}{40}$$
• (b) $$\frac{19}{40}$$
• (c) $$\frac{1}{2}$$
• (d) $$\frac{20}{40}$$

Author: user