IQ Brain Teaser #123
A box contains 4 coins, 2 of which are normal in that they have heads on one side, tails on the other, and 2 of which have heads on both sides. You randomly select one of the coins. If the face you are looking at is heads, what chance is there that the other side is tails?

1/2
3/7
2/5
1/3
2/7
1/4
1/5
1/6
1/7
None of the above are correct

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