Lemma
EasyConditional probability
OpenStax, Statistics §3.2 Independent and Mutually Exclusive Events · Try It 9 · Probability · Conditional probability

Independent and Mutually Exclusive Events · Try It 9

Mark is deciding which route to take to work. His choices are I = the Interstate and F = Fifth Street.

• P(I) =.44 and P(F) =.55
• P(I AND F) = 0 because Mark will take only one route to work.
What is the probability of P(I OR F)?

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OpenStax, Statistics · §3.2 Independent and Mutually Exclusive Events · Try It 9

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