Suppose that three boys A, B, and C throw snowballs at a target. Suppo also that boy A throws 10 times and the probability that he will hit the tar! on any given throw is 0.3; boy B throws 15 times and the probability that will hit the target on any given throw is 0.2; and boy C throws 20 times aJ the probability that he will hit the target on any given throw is 0.1. Determine the probability that the target will be hit at least 12 times.