Question

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?

Answer 1

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%.

Step-by-step 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%.

Answer 2

8.8%

Step-by-step explanation:

I did the test.