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Started By
Message
Please answer this math question
Posted on 11/15/19 at 4:53 pm
Posted on 11/15/19 at 4:53 pm
I have a spinner that is half white and half gray. If you spin it 3 times, what is the probability of landing on gray exactly 2 times?
17
Posted on 11/15/19 at 4:54 pm to Cool Hand Luke
350
ETA
By now, people should know better than to ask math questions, or questions that pertain to numbers on the OT.
ETA
By now, people should know better than to ask math questions, or questions that pertain to numbers on the OT.
This post was edited on 11/15/19 at 4:56 pm
Posted on 11/15/19 at 4:54 pm to Cool Hand Luke
About 3 in 50...
Posted on 11/15/19 at 4:54 pm to Cool Hand Luke
288
Posted on 11/15/19 at 4:55 pm to Cool Hand Luke
Is the bottom half gray?
Posted on 11/15/19 at 4:55 pm to Cool Hand Luke
25.666%
Posted on 11/15/19 at 4:56 pm to Cool Hand Luke
no, do your own damn home work
Posted on 11/15/19 at 4:56 pm to Cool Hand Luke
7
Posted on 11/15/19 at 4:56 pm to LSUGrad9295
But really, there are 8 things that can happen in 3 spins.
WWW
GGG
WWG
GGW
WGW
GWG
GWW
WGG
In 3 of those 8, you get gray twice. So 3 in 8 or 37.5%
WWW
GGG
WWG
GGW
WGW
GWG
GWW
WGG
In 3 of those 8, you get gray twice. So 3 in 8 or 37.5%
This post was edited on 11/15/19 at 4:59 pm
Posted on 11/15/19 at 4:57 pm to LSUGrad9295
Duh.
Posted on 11/15/19 at 4:58 pm to Cool Hand Luke
Each spin is independent, so you have 1/2 chance each time. I'm too tied to figure out the rest
Posted on 11/15/19 at 4:59 pm to LSUGrad9295
This is what I got, but the answer the book has is 3/8. It doesn't say they have to be consecutive. I don't know.
Posted on 11/15/19 at 5:01 pm to Cool Hand Luke
quote:
This is what I got, but the answer the book has is 3/8. It doesn't say they have to be consecutive. I don't know.
Read my edit of that post. I corrected it to be 3 of 8
Posted on 11/15/19 at 5:01 pm to LSUGrad9295
I miscounted the number of times gray occurred twice
Posted on 11/15/19 at 5:02 pm to LSUGrad9295
quote:
But really, there are 8 things that can happen in 3 spins.
WWW
GGG
WWG
GGW
WGW
GWG
GWW
WGG
In 3 of those 8, you get gray twice. So 3 in 8 or 37.5%
You're thinking of the question wrong...it was simply what the odds of it being gray twice are.
So that gives you
All white
All gray
One white, two gray
Two gray, one white
So the answer is 25%
Got any other brain busters for me?
This post was edited on 11/15/19 at 5:03 pm
Posted on 11/15/19 at 5:02 pm to Cool Hand Luke
1 in 2 of getting grey.
1 in 2x2 of getting grey twice or 1 in 4.
1 in 2x2x2 of getting grey thrice or 1 in 8.
Probability of getting 2 of 3 will be 2 in 2x2x2. or 2 in 8 or 1 in 4.
1 in 2x2 of getting grey twice or 1 in 4.
1 in 2x2x2 of getting grey thrice or 1 in 8.
Probability of getting 2 of 3 will be 2 in 2x2x2. or 2 in 8 or 1 in 4.
This post was edited on 11/15/19 at 5:05 pm
Posted on 11/15/19 at 5:03 pm to Cool Hand Luke
3
5
0
5
0
Posted on 11/15/19 at 5:06 pm to Chucktown_Badger
quote:
If you spin it 3 times, what is the probability of landing on gray exactly 2 times?
Has to be W once
Posted on 11/15/19 at 5:08 pm to Cool Hand Luke
Is it a European spinner or a Chinese spinner?
Posted on 11/15/19 at 5:09 pm to Cool Hand Luke
It should be around 50%, at 3 times it would be random. The more spins, the closer to 50% statistically.
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