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3 years ago

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A book can be classified as either non-fiction or fiction. Suppose that 80% of books are classified as fiction. Two books are ch

osen at random. What is the probability that both books ara fiction?

1 answer:

RUDIKE [14]3 years ago

4 0

Answer:

The probability of choosing two books at random and having them both be fiction is 64%.

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The professor informs the class that there will be a test next week. what is the probability that a randomly selected student st

marusya05 [52]

The probability that students who were randomly selected studied for the test, if they pass it with a B or higher grade is: D. 0.80.

<h3>How to calculate the probability?</h3>

In this exercise, you're required to determine the probability that students who were randomly selected studied for the test, if they pass it with a B or higher grade. Thus, we would apply Bayes's theorem.

Let S represent studied for.

Let B represent a score of B or higher grade

Therefore, we need to find P(S|B):

$S|B = \frac{B|S \times S}{B|S \times S\; +\; B|S' \times S'} \\\\S|B = \frac{0.55 \times 0.6}{0.55 \times 0.6 \;+ \;0.2 \times 0.4}\\\\S|B =\frac{0.33}{0.33 + 0.08} \\\\S|B =\frac{0.33}{0.41}$

S|B = 0.80.

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<u>Complete Question:</u>

At the beginning of the semester, a professor tells students that if they study for the tests, then there is a 55% chance they will get a B or higher on the tests. If they do not study, there is a 20% chance that they will get a B or higher on the tests. The professor knows from prior surveys that 60% of students study for the tests. The probabilities are displayed in the tree diagram.

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2 years ago

What evidence from the text best supports the theme that women have an equal right to be free? ""He is legally freed from all ob

lesya692 [45]

Answer:

The right answer is: "There must be a perfect freedom on both sides". beyond the mere symbolism that represents the delivery of a ring, it is assumed in this context that the woman will also enjoy the emancipation that the marriage dissolution represents. In such a way that the independence of the woman must be the same -or even bigger- than the man.

Explanation:

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A/an Is prepared by studding an onion with a few whole cloves and a bay leaf

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I think the answer is making a bechamel sauce

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3 years ago

The reconstruction act of 1867 was significant because it granted suffrage to all african american men. gave all adult african a

loris [4]

The Reconstruction act of 1867 was significant because it granted citizenship to anyone born in the United States.

Reconstruction act of 1867 had outlined the terms for readmission to representation of the rebel states. Eventually, the bill divided the former Confederate states, except Tennessee, into military districts, five in number. The act also set a punishment fir certain social behaviors.

Reconstruction act of 1867 was Lincoln's reconstruction plan after the civil war. It stated that a state could come back to the union when ten percent of its voters in the 1860 election pledged their allegiance to the US as well as pledged to agree to the emancipation.

To learn more about Reconstruction act of 1867, click

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1 year ago

Kendall says the sum of (6x2 4xy 2y2) and (4x2 – 2xy – 3y2) is (10x2 2xy – 5y2). What error did Kendall make? He combined the li

Luda [366]

Answer:

He combined the like terms 2y^2 and -3y^2 incorrectly.

Explanation:

2y^2 + (-3y^2) = -1y^2. Not -5y^2.

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2 years ago

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