Posted by Taylor on Wednesday, October 17, 2007 at 8:39pm.
Poll of statistic students revealed that 44% study alone, 31% study in a group, 12% study both alone and in a group
Find the probability that a randomly selected statistic student studies alone but not in a group.

Math Help  Reiny, Wednesday, October 17, 2007 at 11:28pm
I made a Venn diagram, showing 12% in the intersection of the "alone" circle and the "group" circle.
It showed 32% falling in the "alone" only part, and 19% falling in the "group" only part.
This left 63% outside the two circles.
Does that mean that 63% don't study at all? Or they study in some other way?
Anyway the probability that they study alone and not in a group is .32
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