Probability Predictions

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 theoretical probability?

Back

Theoretical probability is the probability of an event calculated based on the possible outcomes in a perfect scenario.

Front

How do you calculate the probability of an event?

Back

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

Front

If a spinner has 4 equal sections, what is the probability of landing on any one section?

Back

P(section) = 1/4.

Front

What is the probability of landing on yellow if the spinner has 3 yellow sections out of 12?

Back

P(yellow) = 3/12 = 1/4.

Front

How do you set up a proportion for predicting outcomes?

Back

Set up a ratio of the part to the whole for the event and compare it to the total trials.

Front

What is the probability of drawing a red ball from a basket with 5 red, 3 yellow, and 2 green balls?

Back

P(red) = 5/(5+3+2) = 5/10 = 1/2.

Front

What is the probability of spinning an even number on a spinner with numbers 1 to 6?

Back

P(even) = 3/6 = 1/2.

Front

What is the combined probability of two independent events?

Back

P(A and B) = P(A) * P(B).

Front

If the probability of an event is 0.25, what is the probability of it not occurring?

Back

P(not A) = 1 - P(A) = 1 - 0.25 = 0.75.