Math Problem Statement

A test was given to a group of students. The grades and gender are summarized below

A B C Total Male 4 16 18 38 Female 13 14 6 33 Total 17 30 24 71

If one student is chosen at random from those who took the test,

Find the probability that the student got a 'C' GIVEN they are male.

Solution

To find the probability that a randomly chosen student got a 'C' given they are male, we use the concept of conditional probability.

The probability of a student getting a grade 'C' given they are male is calculated as:

P(C | Male)=Number of males who got a ’C’Total number of malesP(\text{C | Male}) = \frac{\text{Number of males who got a 'C'}}{\text{Total number of males}}

From the table:

  • The number of males who got a 'C' is 18.
  • The total number of males is 38.

Thus,

P(C | Male)=1838=9190.474P(\text{C | Male}) = \frac{18}{38} = \frac{9}{19} \approx 0.474

So, the probability that a student got a 'C' given they are male is approximately 0.474 or 47.4%.

Would you like further clarification or have any questions?


Here are 5 related questions that expand on this concept:

  1. What is the probability that a randomly chosen student is male given they got an 'A'?
  2. What is the probability that a student got an 'A' given they are female?
  3. What is the probability that a randomly chosen student got a 'B'?
  4. What is the probability that a student is female given they got a 'C'?
  5. What is the probability that a student chosen at random is male?

Tip: When working with conditional probability, remember that it narrows the "sample space" to only the condition given in the problem.

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Math Problem Analysis

Mathematical Concepts

Conditional Probability
Probability Theory

Formulas

P(C | Male) = (Number of males who got a 'C') / (Total number of males)

Theorems

Conditional Probability

Suitable Grade Level

Grades 10-12