 This is a video on calculating binomial probabilities. If a seed is planted, it has a 75% chance of growing into a healthy plant. If six seeds are planted, what is the probability that exactly two don't grow? All right, so this is a binomial experiment. You have a set number of trials. You have a probability of a success in each trial. And then you also know that the trials are independent. So what's more important is that I do probability that exactly two don't grow. So I'm looking at the behavior of a plant not growing. So a success in this case, because we always talk about binomial experiments in terms of a success, a success is as silly as it may sound, is a seed not growing. So to conduct my binomial probability and calculate it, I need to find the probability that a seed does not grow. Well, if the probability that a seed does grow is 75%, the probability a seed does not grow is 25% or 0.25. So this is my probability of a success, p, it's 0.25. All right, so in Google Sheets, I have to put the following information in. First, I need to do my total number of trials, total number of seeds planted, six. Probability of a success. The probability of a success that one seed doesn't grow is going to be 0.25. And then I need to type in a lower bound and then the upper bound. So how many successes or how many seeds that don't grow are we interested in? We're interested in exactly two, just two, not three, not four, not five, not six, just two. So as a result, since we're only interested in two successes or two seeds not growing, the lower and upper bound are both the same. Anytime you deal with exactly a certain number, lower bound, upper bound are the same. So go to Google Sheets, go to the compute tab. Once you're there, you go to the binomial region, you type in your number of trials, which is six, probability of a success, which is 0.25, and then lower and upper bound are both two in this case. You get 0.2966. So the answer is 0.2966. So that is the probability that exactly two seeds do not grow.