<p>Kimchee</p>
<p>Was -4 A or 4 A?</p>
<p>didnt the one with the radio say “what is the chance the second radio picked is ALSO not defective?” so doesnt that mean the prob of both being not defective? this was like number 13 so it was a fairly hard question and 3/5 would be too easy of a choice…i was confident in my 2/5 but now im doubtful. does anyone else remember it saying “also”?</p>
<p>Ok, so it has been established that there were two 4’s.</p>
<p>One was the divisible one. What was the other one?</p>
<p>abc, you are over analyzing it. It was definitely 3/5</p>
<p>i put 3/5. but i remember reading the question like you did too. am i wrong?</p>
<p>The thing is that it gave us that he picked a working radio. So that is over and done with. The next one is unrelated to the first choice, other than the fact that fraction is reduced to 3 working and 5 total.</p>
<p>was the radio question in the same section as the weird series and geometry questions?</p>
<p>i thought the overlap one was 4? it was 5 rods 30 becoming 22</p>
<p>There were 4 overlaps. Size reduced by 8. 8/4 = 2.</p>
<p>drillkid, so you’re saying that 3/5 is right, right? hah</p>
<p>Yes, 3/5 is right.</p>
<p>For the ratio. I remember getting x=(2/3)w so 9x^2=4w^2
So if the question was asking x:w shouldn’t it be 9:4?</p>
<p>thanks drillkid!!</p>
<p>abc- I put 2/5 too. I had 3/5 first, but then I reread the question, took note of the “also”, and then realized that question #13 probably wouldn’t be that easy… right?! I guess I’m wrong…</p>
<p>Thestorm, yes it should be 9 to 4. That’s what I got anyways.</p>
<p>And I’m still pretty certain the radio one should be 3/5</p>
<p>yeah i put 3/5 as well.</p>
<p>yeah 3/5 cuz its 6 radios with 2 not working so i was taken out, one good one
its left with 5, and 2 are still bad. to get good its 3/5
its 9/4</p>
<p>it’s 3/5 because out of 5, 2 were defective so it was 3/5. 2/5 is for getting a broken one</p>
<p>let’s see… the one with the 3^10,000 was 1/3 right?</p>
<p>wait, I put 3/5 at first and then changed it to 2/5 because the probability of picking two not defective ones is 4/6 x 3/5?
■■■■ i hate my life.</p>
<p>The stick one was 1 unit not 2.
Explanation - There were 5 sticks each 6 units long. The total length side by side is 30 units. The first stick had one overlap with the second stick. However, the second, third, and fourth sticks had 2 overlaps each, not 1. The last stick again had 1 overlap. Now if each overlap is 1 unit, then the first stick would now have a length of 5, second 4, third 4, fourth 4, and last one 5. 5+4+4+4+5 = 22. I put 2 first but changed it after I went back to it. Tell me if I am wrong about something because I don’t want to misguide.</p>