Question 1
At a college, 60% of students take a math course, 45% take a science course and 30% take both. Given that a student takes science, what is the probability the student also takes math?
AP Statistics Unit 2 review
Unit 2 is 15–25% of Section I, and one shared-context set of three questions on each exam is about probability.
| Weight | 15–25% of the multiple-choice section |
|---|---|
| Topics | 2.1 to 2.12 |
Rules to know
- P(A or B) = P(A) + P(B) − P(A and B).
- A and B are independent when P(A | B) = P(A).
- The condition after the bar sets the denominator.
Distributions
- Binomial: fixed trials, two outcomes, independence, same p.
- Normal: shade the region before you calculate.
- Sample means: mean μ, SD σ/√n, approximately normal for large n.
Try 3 questions
Question 2
In which situation is X binomial?
Question 3
The amounts customers spend at a store are strongly skewed right, with mean $42 and standard deviation $30. For random samples of 100 customers, which best describes the sampling distribution of the sample mean?
Next step
Questions people ask
Is the geometric distribution on AP Statistics in 2027?
No. The course effective fall 2026 removed geometric distributions and combining random variables.