Probability Test Review

Front

What is the definition of 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

P(Event) = Number of favorable outcomes / Total number of possible outcomes.

Front

What does it mean to say events are independent?

Back

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

Front

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

Back

The probability of a certain event is 1.

Front

What is the probability of an event that is impossible?

Back

The probability of an impossible event is 0.

Front

How do you calculate the probability of two independent events occurring together?

Back

P(A and B) = P(A) * P(B).

Front

What is conditional probability?

Back

Conditional probability is the probability of an event occurring given that another event has already occurred, denoted as P(A | B).

Front

What is the probability of drawing a vowel from a set of 26 letters?

Back

P(Vowel) = Number of vowels (5) / Total letters (26) = 5/26.

Front

How do you find the probability of either event A or event B occurring?

Back

P(A or B) = P(A) + P(B) - P(A and B).

Front

What is the probability of selecting a purple chip from a jar containing 4 white, 5 purple, and 1 black chip?

Back

P(Purple) = Number of purple chips (5) / Total chips (10) = 5/10 = 1/2.