Question

An investigative bureau uses a laboratory method to match the lead in a bullet found at a crime scene with unexpended lead cartridges found in the possession of a suspect. The value of this evidence depends on the chance of a false positivethat ​is, the probability that the bureau finds a​ match, given that the lead at the crime scene and the lead in the possession of the suspect are actually from two different​ "melts," or sources. To estimate the false positive​ rate, the bureau collected bullets that the agency was confident all came from different melts.​ Then, using its established​ criteria, the bureau examined every possible pair of bullets and found matches. Use this information to compute the chance of a false positive.

Answer 1

The correct solution will be "32.22%".

Explanation:

The given values are:

X = 612

n = 1899

As we know,

⇒
`P=(X)/(n)`

On substituting the above values, we get

⇒
`=(612)/(1899)`

⇒
`=0.3222`

So that the chance of false positive will be "32.22%".