For a job interview in Kuwait, the probability of success is p = p/20. Suppose X is the number of applicants that invited to the interview until one applicant is successful and get the job. Answer the following questions: a) Explain what distribution should we use in this case and why? b) Find the expected value and the standard deviation of the number of applicants that will be invited to the interview until one applicant is successful. c) Find the probability that at most 3 applicants invited to the interview until one applicant is successful.

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