<PRE><B>Question 426914</B>
Caroline has a 67% chance of receiving an A grade in statistics, a 51% chance of receiving an A grade in mathematics, and a 41% chance of receiving A grades in both statistics and mathematics. Find the probability that she receives an A in statistics or mathematics (or both).
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Draw a Venn Diagram: 2 intersecting circles.
Label one stat and the other math
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Put 41 in the intersection
Put 67-41 = 26 in stat but not in the intersection.
Put 51-41 = 10 in math but not iin the intersection
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P(stat or math or both ) = 0.26+0.41+0.10 = 0.87
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Cheers,
Stan H.
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