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3 years ago

What should be added to 7 4/15 to get 8 2/5

Mathematics

1 answer:

N76 [4]3 years ago

8 0

Answer:

17+(2+3)/5 = 17+1 = 18 or 10

Step-by-step explanation:

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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

$P(A\mid B)=\dfrac{P(B\mid A)P(A)}{P(B\mid A)P(A)+P(B\mid A^C)P(A^C)}\approx0.0657$

(the first equality is Bayes' theorem)

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

4 0

2 years ago

This question here ?!

Yanka [14]

Answer:

The answer is 3.19, someone irrationally deleted my answer previously.

Step-by-step explanation:

Simply substract 2.95 from 18.90 and you will get 15.95

Divide this by 5 to get the price of each and you will get $3.19 which is the correct answer.

6 0

3 years ago

Solve x divided by four equals eight . (1 point) 4 −4 32 −32

schepotkina [342]

X/4 = 8
multiply both sides by 4 to get the value of x
x=32

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3 years ago

Read 2 more answers

On a number line, which fraction is to the right of 3/5 ?

Snezhnost [94]

Answer:

Step-by-step explanation:

i think

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3 years ago

Write two expressions where the solution is 41.

ladessa [460]

One expression could be.... Nine times 4 plus five equals forty one. ALSO... Eight times eight equals sixty four then subtract twenty four equals forty one

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3 years ago

What should be added to 7 4/15 to get 8 2/5​

What should be added to 7 4/15 to get 8 2/5