 This is a video on calculating binomial probabilities. Assume an experiment is binomial with n equals four trials. Complete the probability distribution given the probability p equals 0.225. So I'm going to complete the probability distribution by using the binomial region of the calculate tab in Google Sheets. In each of the regions, to calculate it, I'll type in n equals four for number of trials in Google Sheets. Probability of success is 0.225. And then my lower bound and upper bound will be whatever the x value is I'm looking at. So I have lower is zero, upper is zero. That'll be my first input. Then I'll go in and I'll type one for the lower and upper, two for the lower and upper, three, four. And then I'll have five different answers by the end of that. So Google Sheets, go to the compute tab if you're not there already, to the binomial region. You know that in this case you have four trials. Probability of success is 0.225. Lower bound and upper bound will be zero. So take note of the answer that you have the four decimal places. Then you'll go and you'll change your lower bound and upper bound to one. Go ahead and make a note of your answer to four decimal places. Change your lower bound and upper bound to two. Make a note of your answer to four decimal places. And lower bound, upper bound will be three. Take note of your answer to four decimal places. Lower bound, upper bound will be four. Take note of your answer to four decimal places. All right. So we have all five of our probabilities now. So let's write those in. The probability that x is equal to zero. Number of success is zero is 0.3608. x is one. The probability is 0.4189. x is two. Probability is 0.1824. x is three. The probability is going to be 0.0353. x is four. Probability is going to be 0.0026. And that's your completed probability distribution. Much easier than calculating the probabilities by hand. And if you were to add these up, you should get one or a number that's very, very, very close to one. The only reason why it might not be one is if some rounding error caused it to be a little bit off. So that's how to make a probability distribution for a binomial experiment.