Probability Practice - 7th Grade Math

Front

What is the probability of drawing an even number from a set of numbers?

Back

P(even number) = 3/6

Front

What is the probability of drawing a number less than 7 from a set of numbers?

Back

P(less than 7) = 1

Front

What are complementary events in probability?

Back

Complementary events are the events of one outcome happening and that outcome not happening. The sum of the probabilities of an event and its complement is 1 or 100%.

Front

If two marbles are drawn from a bag containing 3 purple, 1 blue, and 1 yellow marble, and the first marble drawn is blue, what is the probability of drawing a second marble that is purple?

Back

P(second marble is purple) = 3/4

Front

What do we call the possible results of an event in probability?

Back

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 a simple event in probability?

Back

A simple event is an event that consists of a single outcome.

Front

What is a compound event in probability?

Back

A compound event is an event that consists of two or more simple events.

Front

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

Back

P(rolling a 3) = 1/6

Front

What is the probability of flipping a coin and getting heads?

Back

P(getting heads) = 1/2