Chances on picking the solution at random

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If you choose an answer to this question at random, what's the chance you will be correct?
a) 25%
b) 50%
c) 60%
d) 25%

This problem has a solution?
 
Mathematics news on Phys.org
Probability of selecting correct answer at random given 4 non-identical choices: 1/4
Probability of selecting correct answer of this problem, given 2 of the answers are identical: 1/3.
 

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