Question 1078291
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There are 373 students in a college who have taken a course in calculus, 211 who have take a course in discrete mathematics, 
and 161 who have taken a course in both calculus and discrete mathematics. How many students at this college have taken 
a course in either calculus or discrete mathematics? 
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<pre>
373 + 211 - 161 = 424 student take either calculus or discrete mathematics.
</pre>

For details, see the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/word/misc/Counting-elements-in-sub-sets-of-a-given-finite-set.lesson>Counting elements in sub-sets of a given finite set</A>

in this site.


Similar problems were solved in this lesson; they are your samples.