Of the applicants for a teaching position,
70% have teaching experience, 54% have
a master's degree, and 32% have both
teaching experience and a master's
degree. If an applicant is chosen at
random, what is the probability that they
have a master's degree, given that they
have teaching experience?



Answer :

To find the probability that an applicant has a master's degree given that they have teaching experience, we will use the concept of conditional probability. The conditional probability of an event B given that event A has occurred is denoted as P(B|A) and can be calculated using the formula: \[ P(B|A) = \frac{P(A \cap B)}{P(A)} \] Here, we want to find P(Master's Degree | Teaching Experience). From the information given, we have: - P(Teaching Experience) = 70% or 0.70, - P(Master's Degree) = 54% or 0.54, - P(Both Teaching Experience and Master's Degree) = 32% or 0.32. Now, P(Master's Degree | Teaching Experience) will be calculated as follows: \[ P(Master's Degree | Teaching Experience) = \frac{P(Teaching Experience \cap Master's Degree)}{P(Teaching Experience)} \] Substituting the given values, we get: \[ P(Master's Degree | Teaching Experience) = \frac{0.32}{0.70} \] Now, divide 0.32 by 0.70: \[ P(Master's Degree | Teaching Experience) \approx 0.4571 \] Therefore, the probability that an applicant has a master's degree, given that they have teaching experience, is approximately 45.71%.