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Six billiard balls, numbered 1 through 6,

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Asmakan
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Six billiard balls, numbered 1 through 6, [#permalink] New post   23 Sep 2019, 04:56
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Six billiard balls, numbered 1 through 6, are placed in a box. Three of the balls are red, and three are blue. One ball is to be drawn randomly from the box.
Quantity A
Quantity B
The probability that the ball drawn will be an even numbered red ball
.5


A)Quantity A is greater.
B)Quantity B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
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D
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Asmakan
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Re: Six billiard balls, numbered 1 through 6, [#permalink] New post   23 Sep 2019, 05:02
My Q:
1- In Q A, I thought of it:
- the even red balls could be ( 3,0,2,1). So, I thought of dealing with it like " or". So, we can add : .5+.33+.667- .5*.33*.667=1.387 ( approximately ) here above 1 there is something wrong.
The answer and Justification from MGRE that the answer is D : that we don't have exact and detailed information.

Moreover, if the question wants need " or " or " and " will it mentioned clearly or not necessary ?
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Re: Six billiard balls, numbered 1 through 6, [#permalink] New post   24 Sep 2019, 01:00
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Not a good question to practice as also is backed up here https://math.stackexchange.com/question ... y-bayesian

Find other sources to practice on the board https://gre.myprepclub.com/forum/search.ph ... tag_id=238

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shubhammathur98
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Re: Six billiard balls, numbered 1 through 6, [#permalink] New post   03 Aug 2021, 17:58
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Asmakan wrote:
Six billiard balls, numbered 1 through 6, are placed in a box. Three of the balls are red, and three are blue. One ball is to be drawn randomly from the box.
Quantity A
Quantity B
The probability that the ball drawn will be an even numbered red ball
.5


A)Quantity A is greater.
B)Quantity B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.


If all the even numbered balls are red, then the probability becomes 0.5 but if there is any other combination, it will be lesser than 0.5 so D
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Re: Six billiard balls, numbered 1 through 6, [#permalink] New post   29 Aug 2022, 14:04
Hello from the GRE Prep Club BumpBot!

Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Six billiard balls, numbered 1 through 6, [#permalink]
29 Aug 2022, 14:04
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