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Probability tree

A metropolitan school system consists of three school districts-norths, south, central. The north district contains 25% of all students, the south district contains 40%, and the central district contains 35%. A minimum-competency test was given to all students; 10
% of the north district students failed, 15% of the south district students failed, and 5% of the central district students failed.

a) Develop a probability tree showing all marginal, conditional, and joint probabilities.
b) Develop a joint probability table.
c) What is the probability that a student selected at random failed the test?

Solution Summary

Word document contains probability tree showing all marginal, conditional, and joint probabilities and joint probability table.
Solution also contains calculations of probability that a student selected at random failed the test

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