I have to feel the need to write the word magenta in magenta. What is the probability of picking a magenta marble? Well, theoretically, there's 100 equally likely possibilities. There's 100 marbles in the bag. And 50 of them involve picking a magenta. So 50 out of 100, and this is the same thing as a 1 half probability. So you could say, well, theoretically, there is a 1 half probability.