Probability

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 an independent event in probability?

Back

An independent event is one where the outcome of one event does not affect the outcome of another.

Front

What is a dependent event in probability?

Back

A dependent event is one where the outcome of one event affects the outcome of another.

Front

How do you calculate the probability of an event?

Back

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

Front

What is the probability of drawing a blue card if 200 out of 5000 cards are blue?

Back

The probability is 200/5000 = 0.04 or 4%.

Front

If you roll a die, what is the probability of rolling a 4?

Back

The probability is 1/6, since there is one favorable outcome (rolling a 4) out of six possible outcomes.

Front

What is the probability of rolling a number less than 3 on a die?

Back

The probability is 2/6 or 1/3, since the favorable outcomes are rolling a 1 or 2.

Front

In a bag with 5 red, 6 blue, 3 green, 4 black, and 2 yellow marbles, what is the total number of marbles?

Back

The total number of marbles is 20 (5 + 6 + 3 + 4 + 2).

Front

What is the probability of drawing a green or black marble from the bag?

Back

The probability is (3 green + 4 black) / 20 = 7/20.

Front

What does it mean to replace an item after drawing in probability?

Back

Replacing an item means putting it back into the sample space, keeping the total number of items the same for each draw.