ACT SAT Prep How to determine the probability of a situation

The video tutorial explains a probability problem where Jude has 12 shirts, 3 of which are black. The task is to find the probability of selecting a non-black shirt. The teacher emphasizes the concept of 'part over whole' in probability, where the total number of shirts is the whole, and the number of non-black shirts is the part. By subtracting the number of black shirts from the total, the teacher calculates the probability of selecting a non-black shirt as 3/4.

What is the total number of shirts Jude has?

• 12

• 15

• 9

• 3

Which method is used to calculate probability in this problem?

• Subtraction method

• Whole over part

• Part over whole

• Addition method

How many shirts are not black?

• 12

• 9

• 6

• 3

What is the probability that Jude selects a non-black shirt?

• 1/4

• 1/2

• 3/4

• 2/3

If Jude randomly selects a shirt, what is the probability it will be black?

• 1/4

• 1/3

• 1/2

• 3/4