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Old 10-11-2012, 07:38 PM   #52
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Quote:
Originally Posted by CoMoChief View Post
None of the above

You have a 33.333% chance of guessing the right answer.

A&D - 25%
B - 50%
C - 60%

Even though there are 4 choices, 2 of them are the same answer, so really there are only 3 different answers to choose from.

The question has nothing to do with what the answers say other than the 2 that are the same (A & D), the numbers are there to confuse you. It has everything to do with the number of different answers you have to choose from.

There are 3 different answers ...25% 50% and 60% 100 / 3 = 33.333%
I concluded the same thing, with slightly different logic. Actually, it might be the same logic reworded.

If you assume that the answer is one of the three listed, then...

There's a 25% chance you pick Option A, which has a 33.3% chance of being right. .25*.33 = .08333 chance of being right.

There's a 25% chance you pick Option B, which has a 33.3% chance of being right. .25*.33 = .08333 chance of being right.

There's a 25% chance you pick Option C, which has a 33.3% chance of being right. .25*.33 = .08333 chance of being right.

There's a 25% chance you pick Option D, which has a 33.3% chance of being right. .25*.33 = .08333 chance of being right.

Your odds of being right = .08333+.08333+.08333+.08333 = .333333.
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