Question 1

If the probability of an event occurring is $$P(	ext{event}) = \frac{3}{8}$$, what are the odds in favor of the event?

Accepted Answer

$$3:5$$

Question 2

A card is drawn at random from a standard 52-card deck. What are the odds against drawing a heart?

Accepted Answer

$$3:1$$

Question 3

If the odds in favor of an event are $$7:3$$, what is the probability of the event?

Accepted Answer

$$\frac{7}{10}$$

Question 4

A spinner is divided into 8 equal sections numbered 1 through 8. What are the odds in favor of landing on an even number?

Accepted Answer

$$1:1$$

Question 5

If the odds against an event are $$4:9$$, what is the probability that the event will occur?

Accepted Answer

$$\frac{9}{13}$$

Question 6

A bag contains 5 red marbles and 7 blue marbles. What are the odds against drawing a red marble?

Accepted Answer

$$7:5$$

Question 7

If the probability of an event is $$P(	ext{event}) = 0.2$$, what are the odds in favor of the event?

Accepted Answer

$$1:4$$

Question 8

A die is rolled. What are the odds in favor of rolling a number greater than 4?

Accepted Answer

$$1:2$$

Question 9

If the odds in favor of an event are $$2:5$$, what are the odds against the event?

Accepted Answer

$$5:2$$

Question 10

A medical test correctly identifies a disease 95% of the time. What are the odds in favor of the test correctly identifying the disease?

Accepted Answer

$$19:1$$

Question 11

If the odds against an event are $$6:1$$, what is the probability that the event will not occur?

Accepted Answer

$$\frac{6}{7}$$

Question 12

A box contains 3 green, 4 yellow, and 5 purple balls. What are the odds in favor of drawing a yellow ball?

Accepted Answer

$$4:8$$

Question 13

If the probability of an event is $$P(	ext{event}) = 0.75$$, what are the odds against the event?

Accepted Answer

$$1:3$$

Question 14

A survey shows that 60% of people prefer coffee over tea. What are the odds in favor of a randomly selected person preferring coffee?

Accepted Answer

$$3:2$$

Question 15

If the odds in favor of an event are $$5:9$$, what is the probability that the event will not occur?

Accepted Answer

$$\frac{9}{14}$$

Question 16

A jar contains 8 red, 6 blue, and 6 green candies. What are the odds against drawing a green candy?

Accepted Answer

$$14:6$$

Odds and Probability: Quantitative Reasoning Study Notes

Study Guide - Practice Questions