The probability that a student will pass an exam on any trial is 0.7. What is the standard deviation of the number of trials needed to pass the exam?
A) 0.540
B) 0.548
C) 0.782
D) 0.880
E) 0.002

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The Answer of The probability that a student will pass an exam on any trial is 0.7. What is the standard deviation of the number of trials needed to pass the exam?
A) 0.540
B) 0.548
C) 0.782
D) 0.880
E) 0.002

The Probability That a Student Will Pass an Exam on Any