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gregori [183]
3 years ago
8

Who knows the answer to this question

Mathematics
1 answer:
drek231 [11]3 years ago
8 0
To the pic above is B
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Suppose the probability of an athlete taking a certain illegal steroid is 10%. A test has been developed to detect this type of
Travka [436]

Answer:

93.25% probability that they have taken this steroid

Step-by-step explanation:

Bayes Theorem:

Two events, A and B.

P(B|A) = \frac{P(B)*P(A|B)}{P(A)}

In which P(B|A) is the probability of B happening when A has happened and P(A|B) is the probability of A happening when B has happened.

In this question:

Event A: Positive test

Event B: Taking the steroid.

Suppose the probability of an athlete taking a certain illegal steroid is 10%.

This means that P(B) = 0.1

Given that the athlete has taken this steroid, the probability of a positive test result is 0.995.

This means that P(A|B) = 0.995

Positive test:

99.5% of 10%(If the athlete has taken).

100-99.2 = 0.8% of 100-10 = 90%(Athlete has not taken)

Then

P(B) = 0.995*0.1 + 0.008*0.9 = 0.1067

Given that a positive test result has been observed for an athlete, what is the probability that they have taken this steroid

P(B|A) = \frac{P(B)*P(A|B)}{P(A)} = \frac{0.1*0.995}{0.1067} = 0.9325

93.25% probability that they have taken this steroid

4 0
3 years ago
Write the equation of this line in Point-Slope Form.​
Leona [35]

Answer:

y -3 = (-1/2)(x - 5)

Step-by-step explanation:

Slope of line:  Notice that if we go from 7 to 5, the 'run' is -2 and the corresponding 'rise' from 2 to 3 is 1.  Thus, the slope is m = -1/2.

Using m = -1/2 and the point (5, 3), we write the equation of this line in point-slope form as:

y -3 = (-1/2)(x - 5)

5 0
3 years ago
I need help ASAP. ! I’m in 7 grade and I am not very good a math
Stells [14]
Figure 2 & 4

Figure 2 is scaled 2x the size of the letter A
Figure 4 is 2x smaller than the size of the letter A
4 0
3 years ago
If dy/dx=2xy and y(0)=1.<br> What is y(1) equal to?
Llana [10]

dy/dx = 2xy 
dy/y = (2x)dx 
INT(1/y)dy = INT(2x)dx 
ln y + c = x^2 + d 
ln y = x^2 + constant 
y = e^(x^2 + constant) 

1 = e^constant ... so constant=0 ... so y = e^(x^2) 

Verification: 

y = e^(x^2) 
dy/dx = 2x*e^(x^2) = 2xy 
<span>and e^(0^2) = e^0 = 1


I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!</span>
4 0
4 years ago
What is the slope of -2x + 4y = 12 ?
Daniel [21]

Answer:

Slope:  1/4

Step-by-step explanation:

6 0
3 years ago
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