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Aabhash777
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The probability that all the students in Mr Swans class pass their en Updated on: 12 May 2025, 23:50
Originally posted by Aabhash777 on 08 May 2025, 22:18.
Last edited by Bunuel on 12 May 2025, 23:50, edited 1 time in total.
Edited the options.
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35% (medium)

Question Stats:

51% (00:55) correct 49% (00:54) wrong based on 124 sessions

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The probability that all the students in Mr Swan’s class pass their end of year exam is 0.2. If it can be determined, what is the probability that none of the students in Mr Swan’s class pass their end of year exam?

A. 0
B. 0.2
C. 0.8
D. 1
E. This cannot be determined from the information given.
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E
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Bunuel
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The probability that all the students in Mr Swans class pass their en 08 May 2025, 23:38
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Aabhash777
The probability that all the students in Mr Swan’s class pass their end of year exam is 0.2. If it can be determined, what is the probability that none of the students in Mr Swan’s class pass their end of year exam?

A. 0
B. 0.2
C. 0.8
D. This cannot be determined from the information given.
E. 1
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Could you please provide a screenshot or a link confirming that this is a Magoosh question? Thank you!
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Aabhash777
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The probability that all the students in Mr Swans class pass their en 09 May 2025, 00:11
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Why did I even get a warning for this? :(
Here is the screenshot.
Is there something that I did which violates the forum's policy?

If there is something wrong with it, please let me know. I will be extra careful before posting.


Bunuel
Aabhash777
The probability that all the students in Mr Swan’s class pass their end of year exam is 0.2. If it can be determined, what is the probability that none of the students in Mr Swan’s class pass their end of year exam?

A. 0
B. 0.2
C. 0.8
D. This cannot be determined from the information given.
E. 1
Could you please provide a screenshot or a link confirming that this is a Magoosh question? Thank you!
Show more
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Attachment:
GMAT-Club-Forum-367ub992.png
GMAT-Club-Forum-367ub992.png [ 85.95 KiB | Viewed 890 times ]
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Bunuel
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The probability that all the students in Mr Swans class pass their en 09 May 2025, 00:19
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Aabhash777
Why did I even get a warning for this? :(
Here is the screenshot.
Is there something that I did which violates the forum's policy?

If there is something wrong with it, please let me know. I will be extra careful before posting.


Bunuel
Aabhash777
The probability that all the students in Mr Swan’s class pass their end of year exam is 0.2. If it can be determined, what is the probability that none of the students in Mr Swan’s class pass their end of year exam?

A. 0
B. 0.2
C. 0.8
D. This cannot be determined from the information given.
E. 1
Could you please provide a screenshot or a link confirming that this is a Magoosh question? Thank you!
Show Spoiler
Attachment:
GMAT-Club-Forum-367ub992.png
Show more
Thank you for the screenshot. It helps!

In PS, the answer choices are always in ascending or descending order. In the question you posted, they are not. Since Magoosh is a reputable source, it's unlikely they would construct the options that way. In the screenshot you provided, the answer choices are in the correct order, so this appears to be a posting error rather than a source attribution issue. Please make sure to post questions exactly as they appear in the source in the future. Thank you!
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The probability that all the students in Mr Swans class pass their en 12 May 2025, 19:04
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Hi Bunuel,
could you provide the solution for this question? since i chose 0.8
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Bunuel
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The probability that all the students in Mr Swans class pass their en 12 May 2025, 23:58
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dns1357
Hi Bunuel,
could you provide the solution for this question? since i chose 0.8
Show more
The probability that all the students in Mr Swan’s class pass their end of year exam is 0.2. If it can be determined, what is the probability that none of the students in Mr Swan’s class pass their end of year exam?

A. 0
B. 0.2
C. 0.8
D. 1
E. This cannot be determined from the information given.

We are told the probability that all students pass is 0.2. The opposite event of this is that not all pass, which has probability 1 - 0.2 = 0.8. But "not all pass" means at least one student fails, which is not the same as none pass. So, we cannot determine the probability that none pass from the information given.

Answer: E.
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