A study is being conducted in which the health of two independent groups of ten policyholders is being monitored over a one-year period of time. Individual participants in the study drop out before the end of the study with probability 0.2 (independently of the other participants). Calculate the probability that at least nine participants complete the study in one of the two groups, but not in both groups?
A: 0.096
B: 0.192
C: 0.235
D: 0.376
E: 0.469
A: 0.096
B: 0.192
C: 0.235
D: 0.376
E: 0.469
举一反三
- 中国大学MOOC: Which of the following is the study of language and social classes, ethnic groups and genders?
- Even the study’s participants thought that was a lot: this figure is ______ as often as they thought they did.
- Students work in small groups of 3-5 students is _____.( ) A: Group work B: Pair work C: Whole class work D: Individual study
- There appeared two groups of English Enlighteners. One is the moderate group and the other is the revolutionary group.
- There were two groups of English enlighteners, one is the passive group, the other is the radical group.