WARM-UP BASIC 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

How do you calculate the probability of an event?

Back

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

Front

What is the probability of selecting a red ball from a basket containing 5 red, 3 yellow, and 2 green balls?

Back

P(red) = 5/(5+3+2) = 5/10 = 1/2.

Front

If a bag contains 8 red marbles and 6 purple marbles, what is the probability of selecting a purple marble?

Back

P(purple) = 6/(8+6) = 6/14 = 3/7.

Front

What is the probability of not rolling a 2 on a fair die?

Back

P(not rolling a 2) = 1 - P(rolling a 2) = 1 - 1/6 = 5/6.

Front

How do you find the probability of an event that has multiple outcomes?

Back

Add the probabilities of each individual outcome that constitutes the event.

Front

What is the probability of selecting a blue M&M from a mix of 5 green, 6 yellow, 8 blue, and 7 brown M&Ms?

Back

P(blue) = 8/(5+6+8+7) = 8/26 = 4/13.

Front

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

Back

P(heart) = 13/52 = 1/4.

Front

What does it mean if an event has a probability of 0?

Back

It means the event is impossible and will not occur.

Front

What does it mean if an event has a probability of 1?

Back

It means the event is certain to occur.