# Central Limit theory application

Now, I'd like to know $P(\frac{X}{n} < 7420.236)$ for n trials, where X is the above probability distribution, carried out n times. (Or the chance that the average of n trials is smaller than 7420.236) Now with the central limit theorem this approaches the normal distribution as $n\to\infty$ Another thing is that $\frac{X}{n}\to\mu$ if $n\to\infty$ , due to the law of large numbers. Now, here is where I get stuck. From which number onwards can I apply the central limit theorem? And due to the law of large numbers, shouldn't the deviation of the distribution become smaller and smaller? I think it has to do with me dividing by n, but I don't see why it goes wrong, nor how I can help it.