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 a probability of 0 mean?

Back

A probability of 0 means that the event will not occur.

Front

What does a probability of 1 mean?

Back

A probability of 1 means that the event is certain to occur.

Front

If the probability of an event is 30%, what is the probability that it will NOT happen?

Back

70%.

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 rolling a 3 on a fair six-sided die?

Back

1/6.

Front

What is the probability of choosing a letter 'M' from the word 'MATHEMATICS'?

Back

2/11.

Front

If a spinner has 4 equal sections, what is the probability of landing on any one section?

Back

1/4.

Front

What is the probability of landing on yellow or green if the spinner has 4 sections: red, yellow, green, blue?

Back

50%.

Front

What is the total probability of all possible outcomes?

Back

The total probability of all possible outcomes is always 1.