Math Problem Statement

Given P(A) = 0.35, P(B) = 0.25, P(A ∩ B) = 0.25, and P(A ∪ B) = 0.6, find P(not A) and P(not B).

Solution

From the uploaded image, the problem appears to involve probabilities related to sets AA and BB. Here's the interpretation of the problem:

If P(A)=0.35P(A) = 0.35, P(B)=0.25P(B) = 0.25, P(AB)=0.25P(A \cap B) = 0.25, and P(AB)=0.6P(A \cup B) = 0.6, find:

  1. P(not A)P(\text{not } A)
  2. P(not B)P(\text{not } B)

Solutions:

  1. For P(not A)P(\text{not } A): Using the complement rule: P(not A)=1P(A)P(\text{not } A) = 1 - P(A) Substituting P(A)=0.35P(A) = 0.35: P(not A)=10.35=0.65P(\text{not } A) = 1 - 0.35 = 0.65

  2. For P(not B)P(\text{not } B): Similarly, using the complement rule: P(not B)=1P(B)P(\text{not } B) = 1 - P(B) Substituting P(B)=0.25P(B) = 0.25: P(not B)=10.25=0.75P(\text{not } B) = 1 - 0.25 = 0.75

Summary:

  • P(not A)=0.65P(\text{not } A) = 0.65
  • P(not B)=0.75P(\text{not } B) = 0.75

Let me know if you need further clarification or additional questions related to this! Here are some related questions for practice:

  1. What is the probability that neither AA nor BB occurs?
  2. How is P(AB)P(A \cup B) calculated using P(A)P(A), P(B)P(B), and P(AB)P(A \cap B)?
  3. What is the probability of AA occurring but not BB?
  4. If P(BA)P(B | A) is needed, how do you calculate it?
  5. What would happen to probabilities if P(AB)=0P(A \cap B) = 0?

Tip: Always check whether events AA and BB are independent or mutually exclusive when solving probability problems!

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Probability
Set Theory
Complement Rule

Formulas

P(not A) = 1 - P(A)
P(not B) = 1 - P(B)
P(A ∪ B) = P(A) + P(B) - P(A ∩ B)

Theorems

Complement Rule in Probability

Suitable Grade Level

Grades 9-12