In a game of musical chairs, 12 children will sit in 11 chairs arranged in a row (one is left out) in how many ways can the 11 children find seats?

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?