Mathematics, 29.10.2020 18:00 rubimachuca1020

Twenty employees have applied for promotions. This year 7 promotions were awarded. If a random sample of 5 applications was selected. a. What is the probability that at most 2 employees were promoted?
b. What is the probability that no employees were promoted?
c. Find the value of the expected value and the variance of this distribution.

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Twenty employees have applied for promotions. This year 7 promotions were awarded. If a random sampl...