A book recommended from your professor is a reliable source of information.
Answer And explanation
a)
has 1/ probability guess the correct source
b)
Each element in 
is mapped by / . There are 
So there are -1 elements.
number of target elements =
number of source elements = -1
probability = -1 /
c) Probability of the correct target element
1/
Your anwser will be the last one
Answer:
Biometrics
Explanation:
Biometrics is the techniques that is used to measure and identify different characteristic of human being that are usually unique in nature for individuals such as voice characteristics, eye retina and finger prints. These features are unique for every person. These features could be used for different purposes now a day such biometric identification, biometric verification and for forensic purposes.
There are different algorithms to compute and compare these unique characteristics for each user and store in a database for the purpose of identification of the users. This data can also be used for forensic purpose if needed by some security agency to identify some person.
The type of identification in which these features such as voice, finger prints and iris pattern use is called biometrics.
