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by Brian Gladman on June 14, 2015

Sunday Times Teaser 2751 – Red Handed

by Andrew Skidmore

After removing an even number of red cards from a standard 52 card pack, I shuffled those that remained and split them into two piles.

A randomly chosen card from the first pile was black.  After shuffling this card into it, a randomly chosen card from the second pile was red.

It turned out that the probability of these two results was the same whole number percentage.

How many cards had I initially removed from the pack?

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