In a local university, 70% of the students live in the dormitories. A random sample of 75 students is selected for a particular study. The probability that the sample proportion (the proportion living in the dormitories) is between 0.69 and 0.72 is
A. 0.7778.
B. 0.2222.
C. 0.2347.
D. 0.7653.
Answer: B
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