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Door-to-balloon times of less than 90 minutes were achieved in 79.7% of patients who were transferred from the field and in 11.9% of those transferred from emergency departments (p < 0.001).

If X represents the number of times the coin comes up heads then X is a discrete random variable that can only have the values 0, 1, 2, or 3 from no heads in three successive coin tosses to all heads.