2-6 Probability A

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

How do you calculate the probability of an event?

Back

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

Front

What is the probability of rolling a 3 on a standard six-sided die?

Back

1/6

Front

If you flip a coin, what is the probability of getting heads?

Back

1/2

Front

What does it mean for two events to be 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 getting an even number when rolling a die?

Back

3/6 or 1/2 (even numbers are 2, 4, 6).

Front

How do you express a probability as a percentage?

Back

Multiply the probability by 100. For example, 0.8 = 80%.

Front

What are odds in favor of an event?

Back

Odds in favor of an event = (Number of favorable outcomes) : (Number of unfavorable outcomes).

Front

What are odds against an event?

Back

Odds against an event = (Number of unfavorable outcomes) : (Number of favorable outcomes).

Front

If there are 10 balloons: 2 small, 5 medium, 3 large, what are the odds in favor of picking a medium balloon?

Back

5:5 or 1:1.