3 ms·Fortunately, you can average X and Y, or take the more pessimistic answer and use min(X,Y).by gknoy 13y agoFortunately, you can average X and Y, or take the more pessimistic answer and use min(X,Y).Argorak 13y agoVery clever. And empathically bankrupt.imgabe 13y agoYou could also do it twice. Once with both inputs as your dad's age and the average number of times you see your dad and the other for your mom, to get separate estimates for each.