Probability Tree (Q3)

ADMS 2320: TERM TEST #2 PREP · Winter 2025 Chapter 7.1: Random Variables and Discrete Probability Distributions Probability Tree (Q3)

Download the PDF: Chapter 7.1 Questions

One more exam-style question before we get to the Binomial section of Chapter 7. This solution requires the use of the probability tree to find the probability distribution of x.

REMEMBER » Using a Probability Tree to Get a Discrete Probability Distribution:

Each pathway through the tree will lead to an outcome that can be represented as a value of (x) on the discrete random variable table.
Add the joint probabilities of all outcomes with the same value of (x) to get the probability P(x) on the dicrete probability distribution table.

Test your understanding:

Question 1 of 2

1. Question
The probability distribution of a discrete random variable X is shown below, where X represents the number of cars owned by a family.

P(0 < X < 1) is equal to:
- 1. 0.35
- 2. 0.85
- 3. 0.00
- 4. 0.60
Correct

Incorrect
Question 2 of 2

2. Question
The probability distribution of a discrete random variable X is shown below, where X represents the number of cars owned by a family.

P(1 ≤ X < 3) is equal to:
- 1. 0.35
- 2. 0.85
- 3. 0.00
- 4. 0.60
Correct

Incorrect