Probabilities

Front

What is probability?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Front

What is the theoretical probability of an event?

Back

Theoretical probability is the ratio of the number of favorable outcomes to the total number of possible outcomes.

Front

If a coin is flipped 10 times, how many times should we expect heads?

Back

5 times (since the probability of heads is 1/2).

Front

What is the formula for calculating probability?

Back

P(event) = Number of favorable outcomes / Total number of possible outcomes.

Front

What is experimental probability?

Back

Experimental probability is the ratio of the number of times an event occurs to the total number of trials conducted.

Front

If a spinner has 8 sections with 2 purple, 2 yellow, 3 blue, and 1 red, what is the probability of landing on a color that is not yellow?

Back

P(not yellow) = 75%.

Front

What is the probability of landing on a section labeled with a multiple of 4 if it occurs 45 times out of 60 spins?

Back

P(multiple of 4) = 45/60 = 3/4 = 75%.

Front

Jon made 15 out of 35 free throws. What is his experimental probability as a fraction?

Back

P(success) = 15/35 = 3/7 after simplification.

Front

What is the probability of rolling a 3 on a standard six-sided die?

Back

P(rolling a 3) = 1/6.

Front

If a bag contains 3 red, 2 blue, and 5 green marbles, what is the probability of picking a blue marble?

Back

P(blue) = 2/10 = 1/5.