Step 1. Since almost half of the cards are even or 24 cards (counting the 4 face cards of queen as an even number plus 20 cards (4 sets of the cards 2,4,6,8,10) then
(ANSWER if you count face cards as either odd or even)
Step 2. If you don't card the face cards as odd or even then you have 20 cards.
(ANSWER if you don't count the face cards as either odd or even)
I hope the above steps were helpful.
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