Probability Basics

Front

What is probability?

Back

Probability is a measure of how likely an event is to occur, expressed as a number between 0 and 1.

Front

What is the probability of an event that is certain to happen?

Back

The probability of an event that is certain to happen is 1.

Front

What is the probability of an event that is impossible?

Back

The probability of an event that is impossible is 0.

Front

How do you calculate the probability of a single event?

Back

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

Front

If a jar contains 5 green marbles and 14 total marbles, what is the probability of selecting a green marble?

Back

P(green) = 5/14.

Front

What is the probability of not landing on a specific outcome in a spinner with 8 equal sections?

Back

P(not A) = (Total sections - sections for A) / Total sections.

Front

What is the probability of rolling an odd number on a 6-sided die?

Back

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

Front

If you flip a coin 10 times, how many times should you expect to get heads?

Back

You should expect to get heads about 5 times.

Front

What is the probability of rolling a 6 on a 6-sided die?

Back

P(6) = 1/6.

Front

What does it mean to simplify a fraction in probability?

Back

To simplify a fraction means to reduce it to its lowest terms.