View Full Version : Probability brain twister
Nydaa93
Apr 30, 2012, 10:48 PM
Please help:
If you were to randomly choose and answer to this question, what is the probability of you being correct?
A) 25%
B) 50%
C) 35%
D) 25%
TimHathaway98
Apr 30, 2012, 11:11 PM
25%
FirstChair
Apr 30, 2012, 11:28 PM
What question? There is no answer because there is no question. I may not always be correct, but I'm never wrong. ;-)
TimHathaway98
Apr 30, 2012, 11:34 PM
100% is the highest% you can get... there are 4 options with each one being 25% since 25X4=100
jcaron2
May 1, 2012, 08:23 AM
There is a 0% chance that you'll be correct.
TimHathaway is correct that there's a 25% chance of picking any one particular answer. However, both A and D say "25%"; therefore, you'll randomly select "25%" as an answer 50% of the time. Clearly, therefore, 25% cannot be correct.
Meanwhile, the 50% answer only appears once, so there's only a 25% chance that you'll choose it. Therefore, it too can be eliminated as the correct answer.
Finally, 35% also only appear once, so it likewise will be chosen 25% of the time. Again, clearly not the correct answer.
Thus, since none of the multiple choice answers are correct, you have a 0% chance of getting the correct answer.
Nydaa93
May 1, 2012, 08:24 AM
Yes but you have to consider that 25% is there twice.
TimHathaway98
May 1, 2012, 06:05 PM
OK, you guys just lost me... I,thought it was 25%, but seeing there are 2 25's, I guess it could've been 50% also
physic
May 2, 2012, 10:36 AM
A) 25% B) 50% C) 35% D) 25%
there are 4 option and 3 chance D=A
answer: 33.33%
jcaron2
May 3, 2012, 03:43 AM
A) 25% B) 50% C) 35% D) 25%
there are 4 option and 3 chance D=A
answer: 33.33%
33.33% isn't one of the available answers! Therefore, you can't possibly be correct 33.33% of the time.
The answer is 0%.
FirstChair
May 7, 2012, 04:51 AM
The key word is "randomly" therefore I would be correct every time I randomly choose. I Я SMART!