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View Poll Results: What are my chances
3 out of 10 0 0%
4 out of 10 0 0%
4 out of 11 0 0%
4 out of 16 2 100.00%
Voters: 2. You may not vote on this poll

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Old 04-01-2009   #1
Will
 
Join Date: Mar 2009
Posts: 3
Lightbulb Probablity (do I miss the bus)

Math word problem:

You are arriving at the bus stop at 2:41 p.m. and need to arrive at your destination at 2:57 p.m.

The bus ride is a 13 minute ride.
The bus comes every 10 minutes (however, you don't know which minute of the ten minutes you are currently at)

So what are the chances that you arrive on time?

I said that have a three minute window of opportunity, but the teacher said four, because evidently I'm not late if I make it anytime in the 2:57 p.m. minute, I can live with that, but he wants to make it out of the sixteen minutes and this seems illogical to me, because my understanding of the basic equation is "what are the chances that I arrive in the window of opportunity (3 or 4 minutes) that the bus arrives (which be equation will be from 0-10 minutes -- either inclusive 11 minutes or exclusive 10 minutes).

Can someone give me some ammunition to take to class to prove to the teacher that it is not 4 out of 16?
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Old 04-15-2009   #2
marley
 
Join Date: Apr 2009
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Default


this is a cool problem
great job
marley
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Old 04-15-2009   #3
Will
 
Join Date: Mar 2009
Posts: 3
Talking additional thoughts

my thought is this, if question is "Will the bus arrive on time" it WILL arrival in the NEXT ten minutes 100% guraunteed; therefore anything outside of the 100% factor is irrelevevant. So it has to be out of TEN not 16.... just my thoughts.
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Old 09-09-2009   #4
allie_poo123
 
Join Date: Sep 2009
Posts: 2
Default i think

i think it might be 4 out of 11 but then again i might be wrong sorry i cant be any help and im new to this so sorry
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Old 09-10-2009   #5
Will
 
Join Date: Mar 2009
Posts: 3
Default Thanks for looking

Quote:
Originally Posted by allie_poo123 View Post
i think it might be 4 out of 11 but then again i might be wrong sorry i cant be any help and im new to this so sorry
Thanks for responding!
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