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Re: Probability with discrete random distribution [#permalink]
Hi Sandy

Here is the source:
http://cws.cengage.co.uk/aswsbe/student ... h05_02.htm
Their answer is: 0.8791. I cannot get the same answer

Thanks

sandy wrote:
Could you share the source please

The question asks about choosing 2 ppl from 10 people and the probability of the two being male.

There are 4 women and 6 men.

The number of ways we can select 2 men = \(C_2^{6}=\frac{6!}{2! \times 4!}=15\).

The number of ways we can select 2 people = \(C_2^{10}=\frac{10!}{2! \times 8!}=45\).

So the probability of selecting 2 men = \(\frac{15}{45}=0.333\)
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Re: Probability with discrete random distribution [#permalink]
I also got 1/3 as the answer, but halam's spoiler gives a different answer. Can anyone comment?
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Re: Probability with discrete random distribution [#permalink]
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Guys please,

forget these kinds of questions. Maybe they are good just to grasp the concept of probability or other concepts BUT they are not GRE questions.

Why you bother you with this obscure resources where here on the board you do have almost countless questions from the best NON-official resources and you can exploit just the probability tag above to have all the questions you wanna to practice

Tag probability https://gre.myprepclub.com/forum/search.ph ... tag_id=253

You have also almost all GRE books

The last collection for the GRE quant 2019

The Princeton review 1014 questions

Manhattan GRE 5lb books with 1000 questions

Moreover, all the official question explained ALL GRE Official Guides ANDDD all the powerprep software questions GRE - PowerPrep® The FREE Practice Tests Explained 2019

I do not know why people or students go always through the difficult and NOT reliable way/resources.

From what I am seeing here http://cws.cengage.co.uk/aswsbe/students/stu_title.html those are problems for I do not know if is a course or else about Statistics for Business and Economics, which at the core are - true - the same concepts but you are studying for the GRE and the way it crafts the questions. That is another thing.

:?
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Re: Probability with discrete random distribution [#permalink]
Carcass wrote:
Guys please,

forget these kinds of questions. Maybe they are good just to grasp the concept of probability or other concepts BUT they are not GRE questions.

Why you bother you with this obscure resources where here on the board you do have almost countless questions from the best NON-official resources and you can exploit just the probability tag above to have all the questions you wanna to practice

Tag probability https://gre.myprepclub.com/forum/search.ph ... tag_id=253

You have also almost all GRE books

The last collection for the GRE quant 2019

The Princeton review 1014 questions

Manhattan GRE 5lb books with 1000 questions

Moreover, all the official question explained ALL GRE Official Guides ANDDD all the powerprep software questions GRE - PowerPrep® The FREE Practice Tests Explained 2019

I do not know why people or students go always through the difficult and NOT reliable way/resources.

From what I am seeing here http://cws.cengage.co.uk/aswsbe/students/stu_title.html those are problems for I do not know if is a course or else about Statistics for Business and Economics, which at the core are - true - the same concepts but you are studying for the GRE and the way it crafts the questions. That is another thing.

:?


Hello, thank you for your suggestion. What you said is true and it is a good reminder. I am using the tags for my weakness areas and wasn't paying attention to the sources. What do you suggest I limit the sources to? Perhaps: Princeton Review, Barron's, and maybe Magoosh? I finished the whole Manhattan prep book 1st edition but I am having trouble breaking the 80% in quantitative, so I am looking for the hardest questions under the tags in my area of weaknesses.
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Re: Probability with discrete random distribution [#permalink]
1
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Almost all the questions posted on the board are good questions.

maybe some question is ambiguous. However, there is to learn even form those. Of course, we talk about non-official questions.

MGRE, Magoosh probably create the best material. Even our tests are pretty good and in line with the real test.

What I mentioned, probably, are the best resources among all we do have here on the board.

Regards
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Re: Probability with discrete random distribution [#permalink]
Carcass wrote:
Almost all the questions posted on the board are good questions.

maybe some question is ambiguous. However, there is to learn even form those. Of course, we talk about non-official questions.

MGRE, Magoosh probably create the best material. Even our tests are pretty good and in line with the real test.

What I mentioned, probably, are the best resources among all we do have here on the board.

Regards


So would you recommend to skip questions where the source is not specified for now and only do them once I have absolutely exhausted all resources?
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Re: Probability with discrete random distribution [#permalink]
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yeah, probably.

However, practicing all the questions on greprepclub I think you are almost overwhelmed.

But in case you have exhausted them, go for the rest.

Regards
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Re: Probability with discrete random distribution [#permalink]
Answer: 1/3

6c2 / 10c2
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Re: Probability with discrete random distribution [#permalink]
1/3
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Re: Probability with discrete random distribution [#permalink]
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Re: Probability with discrete random distribution [#permalink]
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