Probability Skills

What is the formula for experimental probability?

• Number of favorable outcomes - Total number of outcomes

• Number of favorable outcomes x Total number of outcomes

• Number of favorable outcomes / Total number of outcomes

• Total number of outcomes / Number of favorable outcomes

If a fair six-sided die is rolled, what is the theoretical probability of rolling a 3?

• 1/5

• 1/3

• 1/4

• 1/6

A bag contains 5 red marbles, 3 blue marbles, and 2 green marbles. What is the theoretical probability of drawing a blue marble?

• 2/10

• 1/5

• 4/15

• 3/10

In a class of 30 students, 18 play basketball. What is the experimental probability of a student chosen at random playing basketball?

• 0.5

• 0.6

• 0.4

• 0.7

If you flip a coin 20 times and get heads 14 times, what is the experimental probability of getting heads?

• 0.7

• 0.9

• 0.65

• 0.4

If a spinner is divided into 8 equal sections and stops on section 3, what is the experimental probability of landing on section 3?

• 1/3

• 1/4

• 1/5

• 1/8

A box contains 4 red balls, 3 blue balls, and 2 green balls. What is the theoretical probability of drawing a red ball?

• 4/9

• 2/9

• 1/9

• 3/9

If you roll a fair 12-sided die, what is the theoretical probability of rolling a number less than 7?

• 0.3 or 30%

• 0.5 or 50%

• 0.7 or 70%

• 0.4 or 40%

In a deck of 52 cards, what is the theoretical probability of drawing a heart?

• 1/2

• 1/3

• 1/4

• 1/5

If you randomly select a letter from the word 'PROBABILITY', what is the theoretical probability of selecting a vowel?

• 2/11

• 3/11

• 5/11

• 4/11