Select the correct answer.

Tim works for a cell phone company and is testing their new biometric security feature.

He conducted a test in which 4,000 attempts were made to unlock the phone. Of the attempts to unlock the phone, 25% were made by someone other than the phone's

owner. The results of the test are shown in the table.

Total

Unlocked

2,418

232

Owner

Not the Owner

Total

Did Not

Unlock

582

768

3,000

1,000

4,000

2,650

1,350

What is the probability that someone who is able to unlock the phone using the biometric security feature is not the owner?

To find the probability that someone who is able to unlock the phone using the biometric security feature is not the owner, divide the number of attempts made by someone other than the owner by the total number of attempts to unlock the phone. The probability is 0.3375 or 33.75%.

Explanation:

To find the probability that someone who is able to unlock the phone using the biometric security feature is not the owner, we need to divide the number of attempts made by someone other than the owner (1,350) by the total number of attempts to unlock the phone (4,000).

So, the probability is calculated as:

Probability = Number of attempts made by someone other than the owner / Total number of attempts to unlock the phone = 1,350 / 4,000 = 0.3375

Therefore, the probability that someone who is able to unlock the phone using the biometric security feature is not the owner is 0.3375 or 33.75%.