Probability

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 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

How do you calculate the probability of an event?

Back

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

Front

What is the probability of landing on a blue section if there are 3 blue sections out of 8 total sections?

Back

P(blue) = 3/8.

Front

If a spinner has 8 sections: 2 purple, 2 yellow, 3 blue, and 1 red, what is the probability of landing on a purple or yellow section?

Back

P(purple or yellow) = (2 + 2) / 8 = 4/8 = 1/2.

Front

What does 'unlikely' mean in terms of probability?

Back

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

Front

What is a tree diagram?

Back

A tree diagram is a visual representation of all possible outcomes of an event, showing how they branch out.

Front

If a bag contains 5 quarters, 2 dimes, and 4 pennies, what is the probability of picking a dime?

Back

P(dime) = 2 / (5 + 2 + 4) = 2/11.

Front

What is the total number of outcomes when rolling a die and flipping a coin?

Back

Total outcomes = 6 (for die) x 2 (for coin) = 12.