SAT math question[Venn diagram]

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1

<p>At jones college, there are a total of 100 students. if 30 of the students have cars on campus, and 50 have bicycles, and 20 have both cars ad bicycles. Then how many students have neither a car or a bicycle? </p>

<p>A: 40.</p>

<p>I understand how to get to the answer, but cant the answer be 0 as well? since 50+30+20 = 100 flat? </p>

<p>Does the question have to explicitly state the word"only" in order to just add the values up? So if it doesn't say "only", i must subtract both from 30 and 50? am i correct? help.</p>

2

<p>It can't be zero because of the the 30 with cars and 50 with bikes, 20 has both.</p>

3

<p>Oh, right. Thanks!</p>

4

<p>how do you do this problem</p>

5

<p>"100 - 30 - 50 - 20 = 40" Some great math there somekidinnyc
Its more along the lines of 100 - 30 - (50 - 20) = 40</p>

6

<p>Option1+Option2-Both+Neither=Total
30+50-20+N=100
N=40</p>

7

<p>oops, i meant 100 - 30 - 50 + 20 = 40</p>

<p>I'm sure you guys realized that.</p>

8

<p>How did you delete your own post? I don't see the button.</p>

9

<p>.....I'm nice like that.</p>

10

<p>but how? the only things around my post are Report Problem Post and Reply</p>

11

<p>somekidinnyc is a undercover mod. Seriously.</p>

12

<p>^this explains it all...</p>