You bought 12 baseball cards on monday and 24 baseball cards on tuesday. after giving some baseball cards to your brother, you had 13 left. how many cards did you give to your brother?

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Afootball quarterback has two more chances to throw a touchdown before his team is forced to punt the ball. he misses the receiver on the first throw 25% of the time. when his first throw is incomplete, he misses the receiver on the second throw 15% of the time. what is the probability of not throwing the ball to a receiver on either throw?