Try another version of this question Get help: Box 1: Enter your answer as a reduced fraction (like 5/3, not 10/6) or as an integer (like 4 or -2)
Riley buys a bag of cookies that contains 4 chocolate chip cookies, 7 peanut butter cookies, 8 sugar cookies and 9 oatmeal raisin cookies. What is the probability that Riley randomly selects a peanut butter cookie from the bag, eats it, then randomly selects another peanut butter cookie? Express your answer as a reduced fraction.
Do not enter mixed numbers
Enter DNE for Does Not Exist, oo for Infinity `1/18`