October 2010 Math SAT Thread

Test Preparation SAT Preparation
641

<p>ok here is the answer to the dice problem.</p>

<p>there are 3 6-sided dice. so lets take one dice. the chances of getting any number on a dice is 1/6. we have to find the chances of getting 18…and with a 6-sided die thats only possible if we roll all 6’s. the chances of getting a 6 with one dice is 1/6, so the chances of getting 3 6’s is 1/6 * 1/6 * 1/6, or 1/216. then we need to find the chances of getting a 17…with three dice there are 3 different combinations that add to 17. a 5,6,6; a 6,5,6; and a 6,6,5. each of these has a 1/216 chance of happening (like my explanation above for each number), so since this can happen three times it wud b 1/216 +1/216 + 1/216 or 3/216. add this to the 18 we also have to get and u get 3/216 + 1/216 which wud b 4/216…or…</p>

<p>1/54. end of discussion</p>

642

<p>terrible curve predictions 1x612nt</p>

643

<p>@abashaq93: I think that 1/54 has been established as the answer for a while now…</p>

644

<p>@1x612nt13 I agree with all of those (except for 1/54. I put 1/108, but I’ve accepted my fate.) And no way -1 equals 760. There hasn’t been a curve that harsh ever, plus I still don’t even think this was that easy of an exam. Back in November last year, it went 800-770-750 and I thought that today’s was harder. I’m thinking something along the lines of 800-780-760.</p>

645

<p>Someone call an ETS member and make him/her discuss the dice question.</p>

646

<p>did anyone get a question about cutting a wire into a certain amount so it could be put together into a semicircle?!?!</p>

647

<p>yeah this was definitely a harder math section</p>

648

<p>Thank you all for the clarification. I just constructed it with a ruler & compass, and a 6-8-9 triangle would indeed be acute. I should have been paying attention to the pythagorean theorem for the side lengths.</p>

<p>By the way - what were some problems from the experimental math section?</p>

649

<p>i’m wondering if that was the experimental… haha.</p>

650

<p>Wuu, I never had that question about a wire. Experimental</p>

651

<p>So far I only Have -2 (i think…) plz lets keep it way, and hope that we get a decent curve. Maybe that could result in 760? or 750?</p>

652

<p>Usually -2 is a 740 n the worst case scenario. I really don’t think this time it was that easy to have an 800-770-740 curve.</p>

653

<p>what do you think the score for 1 wrong and 1 skip will be?</p>

654

<p>x and y were both under ten, but it was still 3 because it is 2/3 4/6 and 6/9</p>

655

<p>I got every answer you did, down to the method. But I guessed on the one with teachers and classrooms.</p>

656

<p>lol math curve, for 99.99…% sure will be 800-780/or790-760</p>

657

<p>How do you think the curve will be? I thought there were more than a few difficult, tricky problems…</p>

658

<p>I agree with frankeinsteinz on the curve prediction.</p>

659

<p>yea… so my last curve prediction was completely screwed up so here"s my newer one:
54 : 800
53 : 780
52 : 750
51 : 730</p>

660

<p>Hahahaha to that curve… I remember my first beer!</p>