Need this FAST! Will reward 25pts!! If the force of gravity increases, which measurement will change and how? weight decreases mass increases mass decreases weight increases

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?