Essay
Psychological Tests Narrative
A psychologist tests Grade 7 students on basic word association skills and number pattern recognition skills. Let W be the event a student does well on the word association test. Let N be the event a student does well on the number pattern recognition test. A student is selected at random, and the following probabilities are given: P(W N) = 0.25, P(W
) = 0.15, P(
N) = 0.10, and P(
) = 0.50.
-Refer to Psychological Tests Narrative. What is the probability that the randomly selected student does well on at least one of the tests?
Correct Answer:

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P(W
N ) = P(W) + P(N) - P(W
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Correct Answer:
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