You have 6 books on your shelf. you notice that 3 of them have red covers, and 3 of them have blue covers.
if you choose 2 books from your shelf at random, what is the probability that 1 will have a red cover and 1 will have a blue cover?
enter your answer as a fraction in simplest form, using the / symbol, like this: 42/53

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .