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A test consists of 10 true and false questions. To pass the test, a student must...

A test consists of 10 true and false questions. To pass the test, a student must answer at least seven questions correctly. If the student guesses each question, what is the probability (to four decimal places) that the student passes the test? : Answer.

What is the mean and standard deviation of the number of correct answers? (results to two decimal places)

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Answer #1

Probability calculation by binomial distribution of probability.

Here probability of passing is 0.172

Mean =5

Standard deviation =1.58

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