Basic Probability Rules

Front

What is the probability of an event occurring if the probability of it not occurring is 70%?

Back

30%.

Front

How do you calculate the probability of selecting a specific color from a group of colored items?

Back

Divide the number of items of that color by the total number of items.

Front

What is the formula for calculating the probability of the union of two events A and B?

Back

P(A or B) = P(A) + P(B) - P(A and B).

Front

What does it mean for two events to be mutually exclusive?

Back

Two events are mutually exclusive if they cannot occur at the same time.

Front

In a standard deck of cards, how many total cards are there?

Back

52 cards.

Front

What is the probability of drawing a heart from a standard deck of cards?

Back

1/4 or 13/52.

Front

If the probability of event A is 0.4 and the probability of event B is 0.5, what is the maximum probability of A or B occurring if they are independent?

Back

0.9.

Front

What is the probability of drawing a 5 or a diamond from a standard deck of cards?

Back

16/52.

Front

How do you find the probability of the intersection of two events A and B?

Back

Multiply the probabilities of A and B if they are independent.

Front

What is the probability of rolling a sum of 7 with two six-sided dice?

Back

6/36 or 1/6.