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A set S is composed of 20 multi-colored objects
March 18, 2020 at 5:19 am
I have a probability question that I need to solve:
A set S is composed of 20 multi-colored objects. 4 objects were chosen randomly from S.
What is the probability that 3 of the chosen objects be blue; knowing that there are 8 blue objects in S ?
So, I don't need hell loads of math theory. I only want steps for a solution and I'll be thankful.
Please help me.
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RE: A set S is composed of 20 multi-colored objects
March 18, 2020 at 5:34 am
(March 18, 2020 at 5:19 am)WinterHold Wrote: I have a probability question that I need to solve:
A set S is composed of 20 multi-colored objects. 4 objects were chosen randomly from S.
What is the probability that 3 of the chosen objects be blue; knowing that there are 8 blue objects in S ?
So, I don't need hell loads of math theory. I only want steps for a solution and I'll be thankful.
Please help me.
(8/20) x (7/19) x (6/18)
Quote:I don't understand why you'd come to a discussion forum, and then proceed to reap from visibility any voice that disagrees with you. If you're going to do that, why not just sit in front of a mirror and pat yourself on the back continuously?
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RE: A set S is composed of 20 multi-colored objects
March 20, 2020 at 9:28 pm
(March 18, 2020 at 5:34 am)Mr Greene Wrote: (March 18, 2020 at 5:19 am)WinterHold Wrote: I have a probability question that I need to solve:
A set S is composed of 20 multi-colored objects. 4 objects were chosen randomly from S.
What is the probability that 3 of the chosen objects be blue; knowing that there are 8 blue objects in S ?
So, I don't need hell loads of math theory. I only want steps for a solution and I'll be thankful.
Please help me.
(8/20) x (7/19) x (6/18)
p = (8/20) x (7/19) x (6/18) x (5/17) x 4!
No, that last bit isn't punctuation.
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RE: A set S is composed of 20 multi-colored objects
March 20, 2020 at 10:55 pm
(March 18, 2020 at 5:19 am)WinterHold Wrote: I have a probability question that I need to solve:
A set S is composed of 20 multi-colored objects. 4 objects were chosen randomly from S.
What is the probability that 3 of the chosen objects be blue; knowing that there are 8 blue objects in S ?
So, I don't need hell loads of math theory. I only want steps for a solution and I'll be thankful.
Please help me.
Dood. You have to bang your head against the math yourself, if you truly want to understand the answer. You've seen more than one answer here, and I'm not going to tell you which one is correct. 
If you get to thinking you’re a person of some influence, try ordering somebody else’s dog around.
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RE: A set S is composed of 20 multi-colored objects
March 20, 2020 at 11:09 pm
I'm going to assume that the guy picking is color blind.
Being told you're delusional does not necessarily mean you're mental.
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RE: A set S is composed of 20 multi-colored objects
March 21, 2020 at 2:05 pm
(March 18, 2020 at 5:19 am)WinterHold Wrote: I have a probability question that I need to solve:
A set S is composed of 20 multi-colored objects. 4 objects were chosen randomly from S.
What is the probability that 3 of the chosen objects be blue; knowing that there are 8 blue objects in S ?
So, I don't need hell loads of math theory. I only want steps for a solution and I'll be thankful.
Please help me.
Exactly three? Or at least three?
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RE: A set S is composed of 20 multi-colored objects
March 21, 2020 at 2:53 pm
42! (The exclamation point is punctuation)
God thinks it's fun to confuse primates. Larsen's God!
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RE: A set S is composed of 20 multi-colored objects
March 21, 2020 at 3:27 pm
(This post was last modified: March 21, 2020 at 3:35 pm by Abaddon_ire.)
(March 21, 2020 at 2:05 pm)polymath257 Wrote: (March 18, 2020 at 5:19 am)WinterHold Wrote: I have a probability question that I need to solve:
A set S is composed of 20 multi-colored objects. 4 objects were chosen randomly from S.
What is the probability that 3 of the chosen objects be blue; knowing that there are 8 blue objects in S ?
So, I don't need hell loads of math theory. I only want steps for a solution and I'll be thankful.
Please help me.
Exactly three? Or at least three?
It's an important question.
Assuming that it is exactly three blue out of four drawn. then there are five possible results.
If there are 8 blues, then there are 12 "not blues" The number of alternate colours is irellevant.
Then the possible results are...
Blue, blue, blue, blue.
"not blue", blue, blue, blue.
Blue, "not blue", blue, blue.
Blue, blue, "not blue", blue.
Blue, blue, blue, "not blue".
From there it is mere arithmetic.
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RE: A set S is composed of 20 multi-colored objects
March 21, 2020 at 3:43 pm
Not even going to bother doing 11th grade homework for you pig, that claimed to know CS. Do your own work you unhinged piece of shit. Probabilities is one of the easier disciplines in mathemathics. Find a noose, wrap it around your neck and hang tight on the ceiling as you are a fail as a mathematitian and as a human being. Or set youself on fire. I couldn't care less.
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RE: A set S is composed of 20 multi-colored objects
March 21, 2020 at 4:03 pm
(This post was last modified: March 21, 2020 at 4:05 pm by polymath257.)
There are three types of people: those you can count, and those who can't.
Probabilities are all about counting.
(March 18, 2020 at 5:19 am)WinterHold Wrote: I have a probability question that I need to solve:
A set S is composed of 20 multi-colored objects. 4 objects were chosen randomly from S.
What is the probability that 3 of the chosen objects be blue; knowing that there are 8 blue objects in S ?
So, I don't need hell loads of math theory. I only want steps for a solution and I'll be thankful.
Please help me.
OK, steps for a solution:
1. Determine how many ways there are for picking out three blue objects.
2. Determine how many different ways there are to pick out four objects.
3. Divide the result from 1 by the result from 2.
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