Probability Flashcard 1

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 does a tree diagram represent in probability?

Back

A tree diagram visually represents all possible outcomes of an event, helping to calculate probabilities.

Front

What is the probability of an event that is certain to happen?

Back

The probability of an event that is certain to happen is 1.

Front

What is the probability of an event that is impossible?

Back

The probability of an event that is impossible is 0.

Front

How do you calculate the probability of an event?

Back

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

Front

What is the probability of rolling an odd number on a six-sided die?

Back

The probability is 3/6 or 1/2.

Front

If you flip a coin, what is the probability of getting tails?

Back

The probability is 1/2.

Front

What does 'P(not A)' mean in probability?

Back

'P(not A)' represents the probability that event A does not occur.

Front

If the probability of an event is 3/4, what is the probability of it not happening?

Back

The probability of it not happening is 1 - 3/4 = 1/4.

Front

What is an unlikely event in probability?

Back

An unlikely event is one that has a probability close to 0.