Relations and Functions

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Question

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Question 1 : If P X Q is an empty set then which of the following is a null set?
1. only P
2. only Q
3. either P or Q
4. both P and Q
Answer
7853

Question 2 : If (a, b) = (x, y) then___________
1. a=x
2. a=y
3. a=y and b=x
4. a=x and b=y
Answer
7854

Question 3 : If set P has 4 elements and set Q has 5 elements then find the number of elements in P X Q.
1. 9
2. 4
3. 20
4. 5
Answer
7855

Question 4 : If (x+2, y-3) = (5,7) then find values of x and y.
1. x=3 and y=10
2. x=3 and y=4
3. x=7 and y=4
4. x=7 and y=10
Answer
7856

Question 5 : If P X Q has 10 elements then which is not possible?
1. n(P)=1 and n(Q)=10
2. n(P)=10 and n(Q)=1
3. n(P)=2 and n(Q)=5
4. n(P)=5 and n(Q)=4
Answer
7857