Simple Probability

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 formula for calculating probability?

Back

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

Front

If there are 4 yellow, 6 orange, 3 green, 5 blue, and 2 brown M&Ms, how many total M&Ms are there?

Back

Total M&Ms = 4 + 6 + 3 + 5 + 2 = 20.

Front

What is the probability of selecting a brown M&M from the bowl?

Back

Probability = 2 (brown M&Ms) / 20 (total M&Ms) = 1/10.

Front

What does it mean if an event has a probability of 0?

Back

It means the event is impossible and will not occur.

Front

What does it mean if an event has a probability of 1?

Back

It means the event is certain and will definitely occur.

Front

What is the probability of rolling a number greater than 1 on a single die?

Back

Probability = 5 (favorable outcomes: 2, 3, 4, 5, 6) / 6 (total outcomes) = 5/6.

Front

In a standard deck of cards, how many black cards are there?

Back

There are 26 black cards (13 spades and 13 clubs) in a standard deck.

Front

What is the probability of drawing a black 5 from a standard deck of playing cards?

Back

Probability = 1 (black 5) / 52 (total cards) = 1/52.

Front

If Cristian has a 1/4 chance of missing the bus, what is the probability he is on time to work?

Back

Probability of being on time = 1 - Probability of missing the bus = 1 - 1/4 = 3/4.