SAT ACT Prep How to determine the probability without replacement

The video tutorial explains a probability problem involving a class of 5 juniors and 5 seniors. It covers the process of calculating the probability of selecting two juniors consecutively. The teacher guides students through understanding the total number of students, the concept of selection, and the step-by-step calculation of probabilities, resulting in a final answer of two-ninths.

What is the total number of students in the class?

• 20

• 5

• 10

• 15

How many juniors are there in the class?

• 6

• 3

• 5

• 4

What is the probability of selecting one junior from the class?

• 1/5

• 1/2

• 1/3

• 1/4

After selecting one junior, how many students are left in the class?

• 9

• 8

• 10

• 11

What is the final probability of selecting two juniors consecutively?

• 1/5

• 1/3

• 2/9

• 1/4