Someone help and plz make sure the answer is right

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

The host of a game show is holding a bag with chips to see what prizes the contestants will play for. five (5) of the chips say “new car” ten (10) of the chips say “new tv” three (3) of the chips say “trip to france” contestant named “patty” reaches into the bag. a. what is the probability of choosing a tv chip? b. what is the probability of choosing a car chip next without replacing the 1st chip? c. are these dependent or independent events?

What is the output, or dependent variable of quantity? 1: x 2: f(x) 3: y