Rachel would take 30 minutes to run in 4miles
2+1=3
15/3=5
split the 3 5's in ratio 2:1 and you get 10:5
I like to think of the - or under as the less likely to happen like a cat beating up a bear u don’t want to put your money on the cat so everyone puts there money on the bear making the bear the over and the cat the under
