Compound Probability (Or and And Probability)

Front

What is compound probability?

Back

Compound probability refers to the probability of two or more events happening at the same time. It can be calculated using 'and' (intersection) or 'or' (union) rules.

Front

What does 'or' mean in probability?

Back

In probability, 'or' refers to the union of two events, meaning at least one of the events occurs. The probability of A or B is P(A) + P(B) - P(A and B).

Front

What does 'and' mean in probability?

Back

In probability, 'and' refers to the intersection of two events, meaning both events occur. The probability of A and B is P(A) * P(B) if the events are independent.

Front

How do you calculate the probability of an event?

Back

The probability of an event is calculated as the number of favorable outcomes divided by the total number of possible outcomes.

Front

If a spinner has 2 A's, 3 B's, and 3 C's, what is the probability of spinning a B or C?

Back

The probability of spinning a B or C is 6/8 or 3/4.

Front

What is the probability of rolling a 3 on a 6-sided die?

Back

The probability of rolling a 3 is 1/6.

Front

What is the probability of rolling a number less than 5 on a 6-sided die?

Back

The probability of rolling a number less than 5 is 4/6 or 2/3.

Front

What is the probability of drawing an 'A' or 'E' from the letters in 'ALGEBRA'?

Back

The probability of drawing an 'A' or 'E' is 3/7.

Front

If you roll a die twice, what is the probability of getting a 6 on the first roll and a number less than 5 on the second roll?

Back

The probability is 1/9.

Front

What is the total number of outcomes when rolling a die twice?

Back

The total number of outcomes when rolling a die twice is 6 * 6 = 36.