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professor190 [17]

2 years ago

5

Luisa deposits $44.60 to her bank account on Tuesday morning. on Wednesday, she withdraws $66.30 on Thursday, she wildew $30 Whi

ch answer choke represents the balance in her account on Thursday?
A $51.70

B $140.90. C $ -22.00. D $-51.70

1 answer:

DochEvi [55]2 years ago

6 0

Answer:

The answer is D- $- 51.70

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The probability that a person with certain symptoms has hepatitis is 0.75. The blood test used to confirm this diagnosis gives p

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Answer:

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Step-by-step explanation:

We have to find the probability that an individual who has the symptoms and who reacts positively to the test has hepatitis

Let $E_1$ be the event that denotes the symptoms has hepatitis and $E_2$ denotes the symptoms have not hepatitis

Let A be the event the denotes the blood test result positive

We have to find the value of $P(E_1/A)$

We have $P(E_1)=0.75$

$P(E_2)=1-0.75=0.25$

$P(A/E_1)=86%=0.86$

$P(A/E_2)=5%=0.05$

Using formula

$P(E_1/A)=\frac{P(E_1)\times P(A/E_1)}{P(E_1)\cdotP(A/E_1)+P(E_2)\cdotP(A/E_2}$

Substitute the values in the given formula

Then,we get

$P(E_1/A)=\frac{0.75\times .86}{0.75\times0.86+0.25\times 0.05}$

$P(E_1/A)=\frac{0.645}{0.6575}=0.9809$

$P(E_1/A)=0.981$

Hence, the probability that an individual who has the symptoms and who reacts positively to the test actually has hepatitis =0.981

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