Probability Review 9

Front

What is probability?

Back

Probability is a measure of how likely an event is to occur, expressed as a number between 0 and 1, where 0 means the event cannot happen and 1 means it will definitely happen.

Front

What is theoretical probability?

Back

Theoretical probability is the probability of an event calculated based on the possible outcomes in a perfect scenario, without any experimental data.

Front

How do you calculate the total number of Skittles in a bag?

Back

Add the number of Skittles of each color together. For example, Red (2) + Orange (3) + Purple (4) + Green (5) + Yellow (6) = 20 Skittles.

Front

What is the formula for calculating the probability of picking one Skittle?

Back

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

Front

If there are 20 Skittles in total, what is the probability of picking a Red Skittle?

Back

Probability of Red = Number of Red Skittles / Total Skittles = 2/20 = 1/10.

Front

What does 'and' mean in probability?

Back

In probability, 'and' refers to the joint probability of two events happening together, calculated by multiplying their individual probabilities.

Front

What is the probability of picking a Red then an Orange Skittle?

Back

Probability = (Probability of Red) * (Probability of Orange after Red is picked) = (2/20) * (3/19) = 6/380 = 3/190.

Front

What is the probability of picking a Purple Skittle?

Back

Probability of Purple = Number of Purple Skittles / Total Skittles = 4/20 = 1/5.

Front

What is the probability of picking an Orange then a Yellow Skittle?

Back

Probability = (Probability of Orange) * (Probability of Yellow after Orange is picked) = (3/20) * (6/19) = 18/380 = 9/190.

Front

What is the probability of picking an Orange then a Purple Skittle?

Back

Probability = (Probability of Orange) * (Probability of Purple after Orange is picked) = (3/20) * (4/19) = 12/380 = 3/95.