Simple Probability

Front

What is probability?

Back

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

Front

What is the probability of choosing a day that starts with 'S' from the days of the week?

Back

2/7

Front

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

Back

An event is certain if it will definitely 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

If there are 7 marbles: 3 red, 2 blue, and 2 green, what is the probability of pulling a red marble?

Back

3/7

Front

What is the probability of choosing a letter other than 'A' from the word 'ALGEBRA'?

Back

5/7

Front

What does 'likely' mean in terms of probability?

Back

An event is likely if it has a high chance of occurring, typically with a probability greater than 0.5.

Front

What does 'unlikely' mean in terms of probability?

Back

An event is unlikely if it has a low chance of occurring, typically with a probability less than 0.5.

Front

If you have a bag with 4 red marbles and 6 blue marbles, what is the probability of pulling a blue marble?

Back

6/10 or 3/5

Front

What is the probability of choosing a pink marble if there are no pink marbles in a bag of 10 marbles?

Back

0 (Impossible).