<p>The</a> Official SAT Question of the Day</p>
<p>CB's answer explanation/answer does not make any sense. Can anyone confirm that?</p>
<p>Bumpity bump bump bump bump</p>
<p>it does make sense</p>
<p>n is the amount of people in both clubs…they take up space in both clubs.
n is part of the 15 in the math club
n is part of the 12 in the chess club
these people are in both clubs</p>
<p>15-n is the remaining part of the math club
12-n is the remaining part of the chess club
these people are only in 1 club. the total amount of these people is given by the problem as 13</p>
<p>(15-n) + (12-n) = 13, solve for n</p>
<p>working backwards, we know that n takes up space twice because they are in both clubs. there are a total of 15+12=27 members, and 13 of them are only in one club (given). the remaining is 27-13=14 spaces taken up by 7 people: 7 spaces in one club + 7 spaces in the other club</p>
<p>Another way of thinking it although it is actually the same way:</p>
<p>Where n is the overlap in one of the clubs. (n members of math club are in chess club)
Unique members + Overlap = Total Members
13 + 2n = 27
2n = 14
n = 7</p>
<p>13 people in one group
27-13=14</p>
<p>14 left, but it says remaining are in both groups(so 14 really=7 in each group X2 groups), so you divide it in 2. =7</p>
<p>Let x = the number of kids in both</p>
<p>(15 - x) + (12 - x) = 13
27 - 2x = 13
-2x = -14
x = 7</p>
<p>these people are only in 1 club. the total amount of these people is given by the problem as 13</p>
<p>(15-n) + (12-n) = 13, solve for n</p>
<p>If (15-n) represent the people in the math club, and (12-n) represent the people in the chess club, then how could adding them yield 13 if 13 is the total members of ONLY ONE club? It makes no sense at all.</p>
<p>One club does not refer to a specific club, such as chess club or the math club. It represents the people involved in one club but not the other.</p>
<p>People in Chess but not Math + People in Math but not Chess = 13 is what the question is saying.</p>
<p>^ What Ashika said. 2 is the trick answer, which is probably what most of the people who got it wrong did.</p>
<p>I put 14, but I now realize that that was the total amount of people and not the amount of members who were in both clubs.</p>
<p>I hope that no is not aimed towards me.</p>