3 years ago

Can someone help me! Thanks :)

Mathematics

1 answer:

Citrus2011 [14]3 years ago

7 0

The answer is B -2a :)

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Answer:

Step-by-step explanation:

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2 years ago

A certain virus infects one in every 200 people. a test used to detect the virus in a person is positive 70% of the time when t

V125BC [204]

We're told that

$P(A)=\dfrac1{200}=0.005\implies P(A^C)=0.995$

$P(B\mid A)=0.7$

$P(B\mid A^C)=0.05$

a. We want to find $P(A\mid B)$ . By definition of conditional probability,

$P(A\mid B)=\dfrac{P(A\cap B)}{P(B)}$

By the law of total probability,

$P(B)=P(B\cap A)+P(B\cap A^C)=P(B\mid A)P(A)+P(B\mid A^C)P(A^C)$

Then

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b. We want to find $P(A^C\mid B^C)$ .

$P(A^C\mid B^C)=\dfrac{P(A^C\cap B^C)}{P(B^C)}=\dfrac{P(B^C\mid A^C)P(A^C)}{1-P(B)}\approx0.9984$

since $P(B^C\mid A^C)=1-P(B\mid A^C)$ .

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3 years ago

Round 30713.517126 to the nearest hundred.

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Answer:

3,266.53

Step-by-step explanation:

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Which step shows the result of applying the subtraction property of equality?

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Answer:

First step

Step-by-step explanation:

Subtract the 4 to the other side making the equation

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3 years ago

Find the sum of 93.5 plus 8.7

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93.5 + 8.7 = 102.2

Hope this helps! :)

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3 years ago

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