The probability of getting a certain disease is 0.2. a certain test is available which returns a positive result 90% of the time for those with the disease, and a negative result 75% of the time for those without the disease. compute pr{test positive}. (hint: it may be to draw a probability tree, and round to two decimal plac

 Pr(test positive ) = 0.38.

Step-by-step explanation:

Since we have given that

Probability of getting a certain disease = 0.2

Probability of not getting a certain disease = 1-0.2 = 0.8

Probability that test turns a positive results for those with the disease = 90% = 0.90

Probability that turns a negative results for those without diseases = 75% = 0.75

Probability that turns a positive results for those without diseases = 1-0.75=0.25

So, Probability of test positive is given by

P(having diseases) . P(test positive) + P(not having diseases) . P(test positive)

Hence, Pr(test positive ) = 0.38.

answer: 457.14

step-by-step explanation:

205 - 45 = 160

160 / .35 = 457.142857

fa tha first one you gonna add y to both sides

it look like this

x-y+y=6+y

x=y+6

therefore your answer is

x =y+6

fa tha second one

you gonna flip tha equation

it gonna look like x-4y=y

then add 4 to both sides

it gonna look like tha

x-4 +4 =y +4

so therefore tha answer is x=y+4

step-by-step explanation: