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 and 1, where 0 means the event cannot happen and 1 means the event is certain.

Front

What is the formula for calculating probability?

Back

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

Front

What is an event in probability?

Back

An event is a specific outcome or a set of outcomes from a probability experiment.

Front

What does it mean for events to be independent?

Back

Independent events are those whose outcomes do not affect each other. The occurrence of one event does not change the probability of the other.

Front

What is a sample space?

Back

A sample space is the set of all possible outcomes of a probability experiment.

Front

If a spinner has 10 equal sections numbered 1 to 10, what is the probability of landing on a number greater than 5?

Back

The probability is 1/2, since there are 5 numbers greater than 5 (6, 7, 8, 9, 10) out of 10 total numbers.

Front

What is the probability of spinning a number less than 2 on a spinner with numbers 1 to 5?

Back

The probability is 1/5, as only the number 1 is less than 2.

Front

If you spin a spinner with 3 equal sections labeled A, B, and C, what is the probability of landing on B?

Back

The probability is 1/3, as there is one favorable outcome (B) out of three possible outcomes.

Front

What is the probability of selecting a yellow candy from a bowl with 4 yellow, 6 orange, 3 green, 5 blue, and 2 brown candies?

Back

The probability is 4/20 or 1/5, since there are 4 yellow candies out of a total of 20.

Front

What is the probability of selecting a green candy after selecting a yellow candy without replacement from the same bowl?

Back

The probability is 3/19, as there are now 19 candies left after removing one yellow candy.