Unit 9 Probability Test Review

Front

What is a sample space in probability?

Back

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

Front

List the sample space for flipping two coins.

Back

HH, HT, TH, TT

Front

What is the probability of an event?

Back

The probability of an event is a measure of the likelihood that the event will occur, expressed as a number between 0 and 1.

Front

If a spinner is divided into 5 equal sections, what is the probability of landing on one specific color?

Back

0.20 (1 out of 5 sections) or 20%.

Front

How do you calculate the theoretical probability of an event?

Back

Theoretical probability = (Number of favorable outcomes) / (Total number of outcomes).

Front

In a bag with 3 red, 2 blue, 4 green, and 1 yellow marble, what is the probability of pulling a red marble?

Back

Theoretical probability = 3/10 or 30%.

Front

What does P(not A) represent in probability?

Back

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

Front

If P(A) = 1/4, what is P(not A)?

Back

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

Front

What is the formula to find the expected number of occurrences in a larger sample?

Back

Expected number = (Probability of event) x (Total number of trials).

Front

If 5 out of 25 girls like pink, how many out of 325 would likely say they like pink?

Back

65 girls (5/25 = 1/5; 1/5 of 325 = 65).