Probability Flashcard Practice

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

How do you calculate the probability of an event?

Back

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

Front

What is a combination in probability?

Back

A combination is a selection of items from a larger set where the order does not matter.

Front

What is a permutation in probability?

Back

A permutation is an arrangement of items from a set where the order does matter.

Front

How many ways can you choose 2 candidates from 7?

Back

Using combinations, it is calculated as 7C2 = 21.

Front

What is the formula for permutations of n items taken r at a time?

Back

The formula is nPr = n! / (n - r)!.

Front

What is the total number of outcomes when rolling a die?

Back

There are 6 possible outcomes when rolling a standard six-sided die.

Front

If you have a bag with 5 red and 3 blue marbles, what is the probability of picking a red marble?

Back

Probability = 5/(5+3) = 5/8.

Front

What is the difference between independent and dependent events?

Back

Independent events do not affect each other's outcomes, while dependent events do.

Front

How do you find the probability of two independent events occurring?

Back

Multiply the probabilities of each event: P(A and B) = P(A) * P(B).