Probability Flashcard 1

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 is the formula for calculating the probability of an event?

Back

The probability of an event A is calculated as P(A) = Number of favorable outcomes / Total number of outcomes.

Front

What is the probability of flipping a coin and landing on heads?

Back

P(Heads) = 1/2.

Front

If a die is rolled, what is the probability of rolling a 3?

Back

P(3) = 1/6.

Front

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

Back

An impossible event has a probability of 0, meaning it cannot occur.

Front

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

Back

A certain event has a probability of 1, meaning it will definitely occur.

Front

How do you express the probability of an event in fraction form?

Back

The probability is expressed as a fraction of the number of favorable outcomes over the total number of outcomes.

Front

What is the probability of drawing a red card from a standard deck of cards?

Back

P(Red) = 26/52 = 1/2.

Front

How many total outcomes are there when flipping a coin twice?

Back

There are 4 total outcomes: HH, HT, TH, TT.

Front

What is the probability of rolling a sum of 7 with two dice?

Back

P(Sum of 7) = 6/36 = 1/6.