Big Oh for the problem of n-choose-k in Java

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We are team of excellent developers and writers. We have 2 year experience related to your project field. We can do your project and solve your all problems according to your requirements. We have read your description for projects and we understand what you want so we are confident that we can do it easily in mention time. We assure you that you will be completely satisfy with our work. And after delivering your project if you feel some issue in understanding the projects then we will teach you free until you understand. If you have any question then feel free to ask. We are here for you. Thank you

Hello! What is actually the problem of your project? If you want an efficient algorithm of calculating choose(n, k), I'm ready to implement it (in Java). Nikolay Romashchenko