On a multiple choice test with 15 questions,each question has four possible answers,one of which is correct.For students who guess at all answers,find the standard deviation of the number of correct answers.
A)1.62
B)1.643
C)1.587
D)1.875
E)1.677

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The Answer of On a multiple choice test with 15 questions,each question has four possible answers,one of which is correct.For students who guess at all answers,find the standard deviation of the number of correct answers.
A)1.62
B)1.643
C)1.587
D)1.875
E)1.677

On a Multiple Choice Test with 15 Questions,each Question Has