Chapter 3/Probability Review

Front

What is the result of the expression 12 - 8(5)?

Back

-28

Front

When adding integers, how do you determine the sign of the sum?

Back

The sign of the sum is the same as whatever you have most of (positives or negatives).

Front

If a number cube is rolled 360 times, how many times would you expect to roll a 2?

Back

You would expect to roll a 2 about 60 times.

Front

In a jar with 2 pink, 6 red, and 4 blue marbles, what is the probability of picking a red or blue marble?

Back

The probability of picking a red or blue marble is 5/6.

Front

What is the absolute value of -10 + 3?

Back

The absolute value of -10 + 3 is 7.

Front

Define probability in the context of a single event.

Back

Probability is the measure of the likelihood that an event will occur, calculated as the number of favorable outcomes divided by the total number of possible outcomes.

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 is the expected value in probability?

Back

The expected value is the average outcome of a random event, calculated by multiplying each possible outcome by its probability and summing the results.

Front

How do you calculate the expected number of occurrences in a probability scenario?

Back

Multiply the total number of trials by the probability of the event occurring.

Front

What is the difference between independent and dependent events in probability?

Back

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