Math Problem Statement
Solution
Let's go through the questions one by one based on the table provided.
Table Summary:
- Total Graduates = 1000 (350 Male, 650 Female)
- Confidence (Yes) = 575 (225 Male, 350 Female)
- No Confidence (No) = 425 (125 Male, 300 Female)
(i) A graduate is selected at random, find the probability that the graduate selected is:
1. Confidence in getting a job
To find the probability that a randomly selected graduate has confidence in getting a job: So, the probability is 0.575.
2. Confidence in getting a job given that she is female
This is a conditional probability problem. We want to find , which is the probability that a graduate has confidence given that the graduate is female. So, the probability is 0.538.
(ii) Are the events ‘No confidence in getting a job’ (N) and ‘Male’ (M) mutually exclusive? Justify your answer.
Two events are mutually exclusive if they cannot happen at the same time, i.e., their intersection is empty.
From the table:
- The number of males who have no confidence in getting a job is 125.
- Since there are male graduates who have no confidence, these events are not mutually exclusive.
Justification: There are 125 males who have no confidence, so the two events are not empty.
Would you like more details or have any questions?
Here are 5 related questions:
- What is the probability that a randomly selected graduate is female and has confidence in getting a job?
- What is the probability that a randomly selected graduate is male and has no confidence in getting a job?
- How would you calculate the probability that a randomly selected graduate is either male or has confidence in getting a job?
- What does it mean for two events to be independent, and are the events "Confidence in getting a job" and "Male" independent?
- What is the probability that a randomly selected male graduate has no confidence in getting a job?
Tip: When solving probability problems involving conditional probabilities, always remember to narrow the sample space to the condition being given (in this case, gender).
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Math Problem Analysis
Mathematical Concepts
Probability
Conditional Probability
Mutually Exclusive Events
Formulas
P(Confidence in getting a job) = Total graduates with confidence / Total graduates
P(Confidence | Female) = Number of females with confidence / Total number of females
Mutually exclusive events: Two events are mutually exclusive if they cannot happen at the same time.
Theorems
Probability Theorem
Conditional Probability Theorem
Suitable Grade Level
Grades 9-12
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