Simple Probability

Front

What is probability?

Back

Probability is the chance that some event will occur.

Front

If there are 5 green marbles and 14 total marbles, what is P(green)?

Back

P(green) = 5/19.

Front

What is P(not A) if P(A) = 1/4?

Back

P(not A) = 3/4.

Front

What is the probability of selecting an orange candy if there are only orange candies in the jar?

Back

The probability is 100%.

Front

What does it mean if an event is certain?

Back

It means the probability of the event occurring is 100%.

Front

What does it mean if an event is impossible?

Back

It means the probability of the event occurring is 0%.

Front

If a die is rolled, what is the probability of rolling a 3?

Back

The probability is 1/6.

Front

If there are 10 total candies and 2 are red, what is P(red)?

Back

P(red) = 2/10 or 1/5.

Front

What is the formula for calculating probability?

Back

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

Front

If you flip a coin, what is the probability of getting heads?

Back

The probability is 1/2.