According to a hospital administrator, historical records over the past 10 years have shown that 20% of the major surgery patients are dissatisfied with after-surgery care in the hospital. A scientific poll based on 400 hospital patients has just been conducted.
What is the probability that less than 64 patients will not be satisfied with the after-surgery care?
47.72%
2.28%
97.72%
95.44%
4.56%