Question 1173156
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The number of cars that have at least one of the listed features is


    90 + 60 - 40 = 110.    (*)


The rest,  200 - 110 = 90 cars HAVE NO any of the two listed features.    <U>ANSWER</U>


<U>Explanation</U>


    In formula (*), you add the numbers 90 and 60 due to obvious reason.

    You then subtract the number of 40, BECAUSE you count these 40 cars TWICE, when you add 90 and 60.
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Solved.


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&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>

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