exits on Basic 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 does it mean if an event is 'certain'?

Back

An event is 'certain' if it is guaranteed to happen, with a probability of 1.

Front

What does it mean if an event is 'impossible'?

Back

An event is 'impossible' if it cannot happen at all, with a probability of 0.

Front

What is the probability of rolling a fair 6-sided die and getting a number less than 4?

Back

The probability is 1/2, as there are 3 favorable outcomes (1, 2, 3) out of 6 possible outcomes.

Front

What is the formula for calculating probability?

Back

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

Front

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

Back

The probability is 2/10 or 1/5.

Front

What does 'likely' mean in terms of probability?

Back

'Likely' means that an event has a high chance of occurring, typically with a probability greater than 0.5.

Front

What does 'unlikely' mean in terms of probability?

Back

'Unlikely' means that an event has a low chance of occurring, typically with a probability less than 0.5.

Front

If you have a bag with 10 marbles (4 red, 3 blue, 3 green), what is the probability of picking a red marble?

Back

The probability is 4/10 or 2/5.

Front

What is the probability of flipping a coin and getting heads?

Back

The probability is 1/2, as there are 2 possible outcomes (heads or tails).