Steph Posted August 26, 2014 Report Share Posted August 26, 2014 they weren't game marbles or cat's eyes The test creator had good taste. Link to comment Share on other sites More sharing options...
MyMarbleBuddy Posted August 26, 2014 Report Share Posted August 26, 2014 Are they marbles mixed up, or layered? Are they all the same size? Are the girls blind folded? Do they "select" marbles, as the question states, or get random handfulls? Because maybe Pamela only likes green.... are they playing for "keepsies"? Grade school flash-back! This is how I failed math. I obfiscate by focusing on the test writer's wording, and ignore the actual question. But this time, to show that I have matured a tiny bit, if it is a random grab, I go with Pamela. Anyone else having grade school flash-backs? MarbleBuddy Link to comment Share on other sites More sharing options...
Steph Posted August 26, 2014 Author Report Share Posted August 26, 2014 I chose Fatima. I forgot to consider whether the marbles were put back into the jar after each draw. I'm not sure that would matter though. Link to comment Share on other sites More sharing options...
migbar Posted August 26, 2014 Report Share Posted August 26, 2014 I think Pamela would be more likely. Fatima would have to grab handfuls of all four being green to be MORE than 75%, but Pamela could have 8, 9, or 10 green marbles in her handfuls to be more than 75%. Link to comment Share on other sites More sharing options...
ann Posted August 26, 2014 Report Share Posted August 26, 2014 Anyone else having grade school flash-backs? Oh yes. Terrible ones. Mathematical word problems were the bane of my otherwise sunny childhood. >Shudder< Link to comment Share on other sites More sharing options...
Steph Posted August 26, 2014 Author Report Share Posted August 26, 2014 I thought Fatima because I figured that with 10 marbles the draws would be more likely to hover around the average. I figured it would be easier to get an extreme draw when you only had to pull 4 marbles than when you had to pull 10. Now Mike is making me doubt my answer. I don't think I have enough game marbles around to check. I think I could set up the formulas to compute the probability but it's been a loooong time. It would be good for me though, right? Link to comment Share on other sites More sharing options...
ann Posted August 26, 2014 Report Share Posted August 26, 2014 Yes. I like Fatima's name better, so I'll go with her. Link to comment Share on other sites More sharing options...
MyMarbleBuddy Posted August 27, 2014 Report Share Posted August 27, 2014 Yes! Migbar! That was exactly my reasoning. Key words, "more than 75%" Link to comment Share on other sites More sharing options...
lstmmrbls Posted August 27, 2014 Report Share Posted August 27, 2014 I think the train will arrive in Boston at 10:00am Link to comment Share on other sites More sharing options...
MyMarbleBuddy Posted August 27, 2014 Report Share Posted August 27, 2014 Lol! Link to comment Share on other sites More sharing options...
ann Posted August 27, 2014 Report Share Posted August 27, 2014 But how many oranges from California will it be carrying? Link to comment Share on other sites More sharing options...
ausman Posted August 27, 2014 Report Share Posted August 27, 2014 But how many oranges from California will it be carrying? All of them. Link to comment Share on other sites More sharing options...
ann Posted August 27, 2014 Report Share Posted August 27, 2014 Link to comment Share on other sites More sharing options...
Gnome Punter Posted August 28, 2014 Report Share Posted August 28, 2014 Fatima Y/X =((X/Y)*100%) She has a 60% chance to have 3 green and 1 red Link to comment Share on other sites More sharing options...
MyMarbleBuddy Posted August 28, 2014 Report Share Posted August 28, 2014 Ah yes, to have 75%, but the question says "more than 75%". If Fatima is only drawing 4 marbles, "over 75%" is 100%! So, Pamela, on the train, in Boston, with the candlestick. Link to comment Share on other sites More sharing options...
Steph Posted August 28, 2014 Author Report Share Posted August 28, 2014 If they were coin flips so that you had a 50-50 chance of heads on each flip, then I think it would be a 6.25% chance of getting 4 heads out of 4 flips versus a 5.47% chance of getting 8 or 9 or 10 heads out of 10 flips. With 4 flips, there are 16 possibilities, so the 1 with 4 heads would have a 1/16 chance of happening. If there were 10 flips, then there are 1024 possibilities. There are 45 ways to get 8 heads, 10 ways to get 9 heads, and 1 way to get 10 heads, giving a 56/1024 chance of 8, 9 or 10. I think. Link to comment Share on other sites More sharing options...
Ric Posted August 29, 2014 Report Share Posted August 29, 2014 Since I am feeling lazy, I will simply intuit that "C" is the correct answer and ask others to prove me wrong. lol. Link to comment Share on other sites More sharing options...
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