# Pairs of socks

Ferdinand has twelve pairs of socks, one sock is leaky. What is the probability of putting on a leaky sock?

Correct result:

p =  4.167 %

#### Solution:

$p=100 \cdot \ \dfrac{ 1 \cdot \ 11 }{ 12 \cdot \ 11 } / 2=\dfrac{ 25 }{ 6 }=4.167 \%$

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