Chapter 13 Probability Review

Front

What is a permutation?

Back

A permutation is an arrangement of objects in a specific order. The order matters.

Front

What is a combination?

Back

A combination is a selection of objects where the order does not matter.

Front

How do you calculate the number of permutations of n objects taken r at a time?

Back

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

Front

How do you calculate the number of combinations of n objects taken r at a time?

Back

The formula is C(n, r) = n! / [r!(n - r)!].

Front

What is the total number of outcomes when flipping a coin twice?

Back

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

Front

What is the probability of an event occurring?

Back

The probability of an event is the number of favorable outcomes divided by the total number of possible outcomes.

Front

What is the probability that an event does NOT occur?

Back

It is calculated as 1 minus the probability that the event does occur.

Front

If a bag contains 3 red balls and 2 blue balls, what is the probability of drawing a red ball?

Back

P(Red) = 3/5.

Front

What is the sample space in probability?

Back

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

Front

What is an independent event in probability?

Back

Two events are independent if the occurrence of one does not affect the occurrence of the other.