Develop a joint probability table

Reference no: EM13121595

Probability tree and table

A school system consists of three districts, north, south, and central. The North contains 25% of the students, the south contains 40% and the central contains 35%. A minimum competency test was given to all students; 10% of the north dist. failed, 15% of the south district failed and 5% of the central 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: EM13121595

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