My friend and I are playing a probability game. We would draw from a bag of marbles. There are 5 blue, 10 red, 3 black, and 2 yellow. Given that there are 20 marbles total. What is the probability of drawing a yellow marble?

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236