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Conditional probability

Conditional probability. M=Math test was .73 F= French test was .65 Neither M or F = .08. 1 st find Combined Probability. M=Math test was .73 F= French test was .65 Neither M or F = .08 Combined formula P(M ∩ F) = P(M) + P(F) – P (MUF) .46 = .73 + .65 - .92 Next is conditional.

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Conditional probability

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  1. Conditional probability M=Math test was .73 F= French test was .65 Neither M or F = .08

  2. 1st find Combined Probability • M=Math test was .73 • F= French test was .65 • Neither M or F = .08 • Combined formula • P(M ∩ F) = P(M) + P(F) – P (MUF) • .46 = .73 + .65 - .92 • Next is conditional .08 .27 .19 M .46 F N

  3. Conditional probability • Two steps • find combined probability • P(M ∩ F) = P(M) + P(F) – P (MUF) • .46 = .73 + .65 - .92 • Calculate conditional Probability • P(A | B) = Combined/P(second event) • .46/.65 = .708 passed both

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