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dimaraw [331]
3 years ago
5

A test has multiple choice questions with 3 choices for each answer; only one answer is correct for each question. Suppose a stu

dent guesses the answer to each question. Assuming the guesses are independent, find the probability that the student will guess correctly when answering two questions.
Mathematics
1 answer:
posledela3 years ago
4 0

Answer:

a

Step-by-step explanation:

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Same strategy as before: transform <em>X</em> ∼ Normal(76.0, 12.5) to <em>Z</em> ∼ Normal(0, 1) via

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where <em>µ</em> is the mean and <em>σ</em> is the standard deviation of <em>X</em>.

P(<em>X</em> < 79) = P((<em>X</em> - 76.0) / 12.5 < (79 - 76.0) / 12.5)

… = P(<em>Z</em> < 0.24)

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Answer:

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Step-by-step explanation:

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