Calculating Probability of Events

What is the probability of landing on a number greater than or equal to 4?

• 5/8

• 4/8

• 1/2

• 2/3

Answer explanation

The probability of landing on a number greater than or equal to 4 is 5 out of the total 8 possible outcomes on a standard six-sided die, hence the correct answer is 5/8.

Imagine you're a treasure hunter, and you've found a magical bag filled with colorful marbles. What is the thrilling chance of picking a red marble from this enchanted bag?

• 4/10

• 1/10

• 3/10

• 2/10

Answer explanation

The thrilling chance of picking a red marble is 3 out of 10 marbles in the bag are red, making the probability 3/10.

Which of the following describes experimental probability?

• Perform an experiment to determine the probability

• Determining the expected probability of an event

• Perform a simulation and count the number of possible outcomes

• Use trials to count the number of desired outcomes

Answer explanation

Experimental probability involves performing an experiment to determine the probability, making it the correct choice.

Imagine you're a treasure hunter on a quest, and you've stumbled upon a magical die that can change your fate. You get one chance to roll this die. What's the probability of rolling an even number to unlock the treasure chest?

• 1/4

• 2/6, or 1/3

• 3/6 or 1/2

• 3/4

Answer explanation

The probability of rolling an even number on a standard die is 3 out of 6 possible outcomes, which simplifies to 1/2. Therefore, the correct answer is 3/6 or 1/2.

A ________ consists of 2 or more events.

• single event

• prediction

• compound event

• experiment

Answer explanation

A compound event consists of 2 or more events occurring together, making it the correct choice in this context.

A bag contains 5 quarters, 2 dimes, and 4 pennies. What is the probability of picking a quarter?

• 5/11

• 5/6

• 1/3

• 5

There are 15 girls and 15 boys in 8th period. If Terry randomly selects a member of 8th period, what is the probability that she will select a boy?

• 15/15

• 1/2

• 15/40

• 8/15

What is the probability the spinner stops on yellow?

• .05

• 50%

• 25%

• 3/8

What is the probability of spinning an even number?

• 16 2/3%

• 33 1/3%

• 50%

• 75%

A die is rolled. What is the probability that the result is less than 3 ?

• 1/2

• 1/3

• 1/4

• 1/6