Help needed badly!

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Sharnice

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I've been studying math all day and I've been trying to figure out how to do this problem for the past hour and I can't seem to think anymore! Any help is greatly appreciated.
 

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Sharnice said:
I've been studying math all day and I've been trying to figure out how to do this problem for the past hour and I can't seem to think anymore! Any help is greatly appreciated.
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What's the formula for probability? Please follow posting guidelines: show your work, etc.
 
Hi, Sharnice.

It may be hard to show an hour's work, but it would help us if you told us what sort of things you thought about in that time, so we could make suggestions for more efficient thinking. I suspect this is another case where organizing the data would be a better start than whatever you are doing, but I can't tell.

But here's one place to start (closely related to the definition of probability): How many balls are left in the bin at this point? How many of them will make Meagan a winner?
 
Dr.Peterson said:
Hi, Sharnice.

It may be hard to show an hour's work, but it would help us if you told us what sort of things you thought about in that time, so we could make suggestions for more efficient thinking. I suspect this is another case where organizing the data would be a better start than whatever you are doing, but I can't tell.

But here's one place to start (closely related to the definition of probability): How many balls are left in the bin at this point? How many of them will make Meagan a winner?
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I came up with 94% probability that she will win. I got that by using the fact that 3 have been pulled already, leaving 47. So 47 divided by 50(the total number of outcomes) equates to .94, which converts to 94%. Was that correct?
 
No, though you've got part of the idea. There are not 50 balls anymore, so 50 is irrelevant at this point.

She will win if the next ball is 44. There are 47 balls left. What is the probability that the next ball picked is the 44?
 
Dr.Peterson said:
No, though you've got part of the idea. There are not 50 balls anymore, so 50 is irrelevant at this point.

She will win if the next ball is 44. There are 47 balls left. What is the probability that the next ball picked is the 44?
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So same idea, except 3 over 47, then turn into percentage?
 
Why 3? How many ways are there to win? (You may not be looking carefully at the problem.)
 
Dr.Peterson said:
Why 3? How many ways are there to win? (You may not be looking carefully at the problem.)
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Im not sure why this isnt clicking in my head yet. There are 50 ways to win, and there are just 47 balls left. so I take 44 over 47 ?
 
Sharnice said:
Im not sure why this isnt clicking in my head yet. There are 50 ways to win, and there are just 47 balls left. so I take 44 over 47 ?
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Forget about the original problem. Solve this one: There are 47 balls. What is the probability of pulling out #44?
 
The probability of any event is (the number of favorable outcomes)/(the total number of outcomes).
There are 47 balls left. So I have two questions for you. How many outcomes are favorable and how many possible outcomes are there? Again this is after 3 balls have been picked.
 
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