Creating joint probability table

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Reference no: EM13101613

A metropolitan school system consists of three districts-north, south, and central. The north district contains 25% of all students, the south district contains 4O%, and the central district contains 35%. A minimum-competency test was given to all students; 10% of the north district students failed,5% 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?

Reference no: EM13101613

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