# Set Theory and Algebra MCQ - Sets

66:

The number of functions from an m element set to an n element set is

 A. m + n B. mn C. nm D. m*n Answer Report Discuss Option: C Explanation : Click on Discuss to view users comments. Write your comments here:
67:

If A is a finite set with n elements, then number of elements in the largest equivalence relation of A is

 A. 1 B. n C. n+1 D. n2 Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. Write your comments here:
68:

The number of equivalence relations of the set (1, 2, 3, 4) is

 A. 4 B. 15 C. 16 D. 24 Answer Report Discuss Option: B Explanation : Click on Discuss to view users comments. Write your comments here:
69:

If A and B be sets with cardinalities m and n respectively, then number of one-one mappings (injections) from A to B, when m < n, is

 A. mn B. nPm C. nCm D. None of these Answer Report Discuss Option: B Explanation : Click on Discuss to view users comments. Write your comments here:
70:

If A = (x, y l, then power set of A is

 A. { |x| , |y| } B. {φ,|x|.|y|} C. { φ,| x, y | } D. None of these Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. Write your comments here: