math
posted by sasha michal .
luis has a deck of ten cards with theres numbers 1,3,5,7,9,11,13,15,17,19.luis will draw a card at random from the deck.name an event for which there is a problity of 1/2 that it will happen.name an event for which this is a problity of the that will happen.please help due on friday

since there are 10 cards, here is a 5050 chance that the card drawn is less than 11.
or, greater than 9.
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Can someone please explain this to be, so that I can understand this problem?