# Conditional probability

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3. (TCO 5) The Canadian Services office did a survey of 150 travelers in which they asked if the traveler's first language was French or English. Another question asked was whether the traveler was Canadian born. The results follow.

Canadian Not-Canadian Raw Totals

English 15 50 65

French 65 20 85

Totals 80 70 150

If a traveler is selected at random (from this group of 150 travelers), find the probability that P (The traveler is not Canadian and speaks French as the first language.)

20/85

20/70

0.135

20/150

4. (TCO 5) The Canadian Services office did a survey of 150 travelers in which they asked if the traveler's first language was French or English. Another question asked was whether the traveler was Canadian born. The results follow.

Canadian Not-Canadian Raw Totals

English 15 50 65

French 65 20 85

Totals 80 70 150

If a traveler is selected at random (from this group of 150 travelers), find the probability that P(The traveler is not Canadian, given that the first language is French.)

7/15

8/15

13/30

4/17.

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Answers and explains two questions on conditional probability.

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3. (TCO 5) The Canadian Services office did a survey of 150 travelers in which they asked if the traveler's first language was French or English. Another question asked was whether the traveler was Canadian born. The results follow.

Canadian Not-Canadian Raw Totals

English 15 50 65

French 65 20 85

Column ...

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