Really it can show anything. The main point to the question is that there is 4 of one thing, && then 18 of another. Example: i have 4 bananas && 18 grapes. I want to know how many bananas i have compared tot he grapes. The 4 would come first because i asked for how many bananas i have first then grapes would be second which would leave me with the ratio 4:18. That is just one of the millions of examples!
Answer:
0.049
4.9 % of probability
Step-by-step explanation:
The probability of having the disease is equal to 7%
The probability of testing positive, having the disease is equal to 70%
We are looking for the probability of testing positive.
For that, we need to multiply the probabilities to find the result
P = (0.07)*(0.7)
P = 0.049
P = 4.9%