Fiona is 7 years older than Gavin. Alex is 12 years younger than Gavin. If the total age is 73 how old is the youngest of them?

What is the greater volume 72 quarts or 23 gallons

Negative 5 1/12 + negative 4 1/4 + 6 3/4

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?