# Set Theory and Algebra MCQ - Sets

126:

The symmetric difference of sets A and B is

 A. (A - B) ∪ (B - A) B. (A ∪ B) - (A ∩ B) C. (A - B) ∩ (B - A) D. (A ∩ B) - (A ∪ B) Answer Report Discuss Option: B Explanation : Click on Discuss to view users comments. Write your comments here:
127:

In a classroom containing 28 people, there are 18 people who speak English, 15 people who speak Hindi and 22 people who speak Telugu, 9 people speak both English and Hindi, while 1 people speak both Hindi and Telugu. Further 13 persons speak both Telugu and English. How many people speak all three languages?

 A. 9 B. 8 C. 7 D. 6 Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. Write your comments here:
128:

If [x] denotes integer part of the real number, then the function f(x) = x - [x] is/an

 A. even function B. odd function C. periodic function D. constant Answer Report Discuss Option: B Explanation : Click on Discuss to view users comments. Write your comments here:
129:

If x, y are real numbers such that ordered pairs  (x + y, x -y) and (2x + 3y, 3x - 2y) are equal, then (x, y) is equal to

 A. (1, 1) B. (2, 3) C. (3, - 2) D. (0, 0) Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. Write your comments here:
130:

If Q be the set of non-zero rational numbers and  the relation R be defined over the set Q by  xRy if x = 1/y, x, y ∈ Q, then

 A. R is an equivalence relation B. R is relexive C. R is symmetric D. R is transitive Answer Report Discuss Option: C Explanation : Click on Discuss to view users comments. Write your comments here: