A test subject is randomly selected for a diabetes test. What is the probability of getting a subject who is not diabetic, given that the test result is negative? Find the probability using the data table.

Question

awkseacodon · Answer

0.10

0.12

0.50

0.90

awkseacodon · Answer

@KamiBug

anonymous · Answer

i would say its 0.50

kamibug · Answer

Post the data table? :)

awkseacodon · Answer

Positive Test      Negative Test
Subject is diabetic	    35	           3
Subject is  not diabetic    5	                  28

awkseacodon · Answer

it wasnt .50 :/ but thanks anyway @KeiraG

kamibug · Answer

We're given that the result was negative, so in the demoninator will be the total of negative tests (3+28) and the numerator will have only the negative tests from people who were not diabetic.

kamibug · Answer

So...$$\frac{ 28 }{ 3+28 } = ?$$

awkseacodon · Answer

i got 37.3

kamibug · Answer

How'd you get that? :o Divide 28 by 31 CX

awkseacodon · Answer

i put it in as 28/3+28 why would 28/31 make the answer any different? i swear math is ridiculous. anyway i failed tht question im on another one

awkseacodon · Answer

well nvm i passed the test. i only missed this question.

kamibug · Answer

Oh xP
If you put 28/3+28 in a calculator, it will understand it as (28/3) + 28
So simplify the denominator first :P 28+3 = 31 
28 / 31 = 0.9 
:)

kamibug · Answer

YAY GOOD JOB!!! <3 *high five*

awkseacodon · Answer

math is retarded ._. ik its a need but wtf i didnt even put () F*** PEMDAS t-.-t

kamibug · Answer

XDDD

awkseacodon · Answer

anyway thanks for trying kami c: *high fives back*

kamibug · Answer

Sure cx