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surgery success: a surgical technique is performed on fifteen patients. you are told that there is...

surgery success: a surgical technique is performed on fifteen patients. you are told that there is a 70% chance of success. find the probability that the surgery is:
A. successful for at least seven patients
B. non successful for more than six but less than thirteen patients
C. successful for less than thirteen patients
D. non successful for at least six but no more than eleven patients

Math   Statistics-And-Probability   
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