What is the probability of randomly choosing T from the letters in Pittsburgh

1. what is the formula for finding the vertical distance between two points on a coordinate plane?

Which formula finds the probability that a point on the grid below will be in the blue area? p(blue) = total number of squares number of blue squares number of blue squares p(blue) = total number of squares number of blue squares p(blue) = number of white squares

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15