Probability Test Review

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

If a bag contains 30 pieces of candy with different flavors, how do you calculate the probability of not drawing a specific flavor?

Back

To find the probability of not drawing a specific flavor, subtract the number of that flavor from the total and divide by the total: P(not flavor) = (Total - Number of that flavor) / Total.

Front

What does P(not A) represent in probability?

Back

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

Front

How do you simplify a fraction in probability?

Back

To simplify a fraction, divide the numerator and the denominator by their greatest common divisor (GCD).

Front

What is the probability of drawing a lemon from a bag of 30 candies with 3 lemons?

Back

P(lemon) = Number of lemons / Total candies = 3/30 = 1/10.

Front

If the probability of an event is 1/4, what is the probability of it not occurring?

Back

P(not A) = 1 - P(A) = 1 - 1/4 = 3/4.

Front

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

Back

For two independent events A and B, P(A and B) = P(A) * P(B).

Front

What is the probability of drawing a white ball from a bag containing 2 white and 6 black balls?

Back

P(white) = Number of white balls / Total balls = 2 / (2 + 6) = 2/8 = 1/4.

Front

How do you predict outcomes based on a sample?

Back

To predict outcomes, use the ratio of the sample to the total population: (Sample size / Total size) * Total population.