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3. A multiple choice test contains 15 questions. Each question has four options, only one of
which is correct. What is the probability of guessing exactly 9 questions correctly?

Respuesta :

lazirlufias

Answer:

[tex]\frac{5005\times 3^6}{4^{15}}[/tex]

Step-by-step explanation:

by using binomial property, we get the probability

[tex]P=C^{15}_{9}\times \frac{1}{4^9}\times \frac{3^6}{4^6}[/tex]

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