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3 years ago

5

Help help help help !

1 answer:

larisa [96]3 years ago

4 0

Answer:Its D

Step-by-step explanation:

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2 : 5

Step-by-step explanation:

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Rus_ich [418]

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rate of download- .095 MB a second

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4 years ago

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IgorLugansk [536]

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3 years ago

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A multiple-choice test in which each question has 4 choices only one of which is correct. Assume that 9 questions are answered b

yaroslaw [1]

Answer:

Therefore, the probability is P=0.0084.

Step-by-step explanation:

We know that a multiple-choice test in which each question has 4 choices only one of which is correct. Assume that 9 questions are answered by guessing randomly.

Because we have 4 choices only one of which is correct, we get that p=0.25 and q=0.75.

We calculate the probability of getting exactly 6 correct answers.

n=9 and k=6.

$P=C_k^n\cdot p^k\cdot q^{n-k}\\\\P=C_6^9\cdot 0.25^6\cdot 0.75^3\\\\P=84\cdot 0.0001\\\\P=0.0084$

Therefore, the probability is P=0.0084.

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3 years ago