Question 990031
A survey of 126 college students was taken to determine the musical styles they liked. Of those 39 students listened to rock, 42 to classical and 2 to jazz. Also 20 students listened to rock and jazz,11 to rock and classical, and 21 to classical and jazz. Finally, 6 students listened to all musical styles. Construct a Venn Diagram and determine the cardinality for each region. 
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Draw 3 intersecting circles inside a rectangle(126).
Label the circles rock(39), classical(42), jazz(2)
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There are 6 students in the intersection of all three circles.
Notice:: That means there are more than 2 in "jazz".
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Notice you already have 6 in the intersection of r/j, r/c, and c/j
Put 20-6 = 14 in the intersection of rock and jazz
Put 11-6 = 5 in the intersection of rock and classical
Put 21-6 = 15 in the intersection of classical and jazz
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Put the correct numbers in the remaining sections
of r, c, and j
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Count the total number in r, in c, and in j
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Cheers,
Stan H.
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