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I'm an idiot -- stupid math question.

Forums: Math, Homework, Elementary Math, id10t
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oolongteasup
 
  1  
Reply Tue 20 Oct, 2009 06:57 pm
@JPB,
hey JPB

there are two diagrams which are equally likely to be correct or incorrect

one is shown to be correct

what is the probability that the other diagram is correct?
CalamityJane
 
  1  
Reply Tue 20 Oct, 2009 07:00 pm
@boomerang,
It doesn't call them both "rows"

There is 1 row with 7 people in it - altogether there are 10 rows (1 row = 7 people - 2 row = 14 - 3 row = 21 and so on...)
boomerang
 
  1  
Reply Tue 20 Oct, 2009 07:02 pm
@CalamityJane,
Yes it does:

Quote:
Adria is in the school band. She knows the band has 7 people in each row and that there are 10 rows.

oolongteasup
 
  1  
Reply Tue 20 Oct, 2009 07:14 pm
@boomerang,
are too risible
0 Replies
 
littlek
 
  1  
Reply Tue 20 Oct, 2009 07:20 pm
@boomerang,
row 1 : 1234567
row 2: 1234567
row 3: 1234567
etc
row 10:1234567

10 rows of 7 kids in each row
0 Replies
 
CalamityJane
 
  1  
Reply Tue 20 Oct, 2009 07:31 pm
@boomerang,
boomerang wrote:

Yes it does:

Quote:
Adria is in the school band. She knows the band has 7 people in each row and that there are 10 rows.




Boomer I also could say that there are 7 kernel in each apple
and there are 10 apples
Same principle!
oolongteasup
 
  1  
Reply Tue 20 Oct, 2009 07:37 pm
@CalamityJane,
throws open the two diagrams question above
CalamityJane
 
  1  
Reply Tue 20 Oct, 2009 07:45 pm
@oolongteasup,
Even if you draw and count the rows vertical as opposed to horizontal (like in boomers drawing) oolongteasup, the answer is still 14.
0 Replies
 
JPB
 
  1  
Reply Tue 20 Oct, 2009 07:45 pm
@oolongteasup,
they would only be equally likely to be correct if they didn't come with a description of the layout of the band. Given that they did come with a description of the layout, I'm not sure what benefit your question poses to the problem at hand.
oolongteasup
 
  1  
Reply Tue 20 Oct, 2009 08:49 pm
@JPB,
its a new question
0 Replies
 
 

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