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Anonymous10/17/25, 21:51No.16819583
Well, /sci/?
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Anon10/17/25, 21:54No.16819585
1 in 24.
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Anon10/17/25, 21:58No.16819592
Trick question to filter unlettered thirdies who never read the play. They both arrive at the hour of nine, so 100%.
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Anon10/17/25, 22:00No.16819597
Question is unclear. What random times can they arrive at? Is it 8am to 9am? What happens if they arrive at 8:59am? Do they wait until 9:14 or do they leave at 9:00, since after that their meeting window is over?
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Anon10/17/25, 22:36No.16819635
Call their arrival times tR and tJ. Let's say we choose a tR value. If it's not near the boundaries (8am, 9am), there is a 30min window surrounding tR where tJ will lead to a meeting i.e. a 50% chance (30mins/60mins). If tR is chosen within 15 mins of the boundaries, the effective window for tJ goes down linearly to 50% of its "normal" value. This effectively multiplies the contribution of those tR values by 0.75 since we are integrating a triangle+rectangle of equal heights instead of a rectangle. This applies to exactly half of the tR values. So the probability is
0.5 * 0.5 (from "middle" values not near boundaries)
+ 0.75 * 0.5 * 0.5 (from values near the boundary)
= 7/16
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Anon10/17/25, 22:55No.16819647
So uh I have to calculate the area of the yellow shape somehow. There's two triangles who add up to a 0.25 by 0.25 hours square, and then the rest is a rectangle of width 0.25*sqrt(2) hours and height 0.75*sqrt(2) which is 0.25*0.75*2 = 0.375 hours so the total area is 0.4375 which is also the probability.Am I a brainlet for doing it like this?
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Anon10/18/25, 01:41No.16819716
If they both waited that long than obvious neither of them met, so the probaility is exactly zero.
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Anon10/18/25, 02:48No.16819748
Isn't this more of an insurance problem than a bank?
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Anon10/18/25, 03:05No.16819754
So I'm guessing that this is a "riddle" because instead of doing the integral, they want you to draw a mental picture like
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Anon10/18/25, 04:14No.16819784
1 in 3 you _.
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Anon10/18/25, 11:51No.16819910
0.75
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Anon10/18/25, 14:35No.16819975
>/sci/ doesn't know what a poisson distribution is
Sadge
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Anon10/18/25, 21:53No.16820321
100%... we are omniscient, we know the story, we know they meet.
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Anon10/19/25, 00:50No.16820418
Its slightly less than 15/60 I think, since if you come after 8:45 there is less than 15 minutes of time left in which the other person might arrive. I'm gonna guess that consideration averages out to half, so
45/60 * 15/60 + 15/60 * 7.5/60
= 7/32I have an IQ of 83 btw.
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Anon10/19/25, 11:24No.16820650
There is nothing in the riddle that says that the "random time" they arrive at has to be within the 8:00 AM to 9:00 AM window so the question is retarded as shit.
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Anon10/19/25, 17:28No.16820860
OP can you disprove or confirm this