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If A = {2, 3, 7, 9} and n(A xx B) = 12,...

If A = {2, 3, 7, 9} and `n(A xx B) = 12`, then the number of elements in set B is

A

4

B

3

C

2

D

8

Text Solution

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The correct Answer is:
B
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AAKASH INSTITUTE-RELATIONS AND FUNCTIONS -Assignment (Section - A) Objective Type Questions (one option is correct)
  1. Let A = {2, 5, 7,9} and B = {a, b, c}, then n(A xx B) is equal to

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  2. If A = {4, 8} and B ={p, q, r}, then A xx B is equal to

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  3. If A = {2, 3, 7, 9} and n(A xx B) = 12, then the number of elements i...

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  4. If A = {5, 7, 8} and B = {9, 11}, then

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  5. If A and B are any two sets, then

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  6. The relation R from A to B is given as R = {(1, 2), (2, 5), ((1)/(2), ...

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  7. The relation R from A to B is given as R = {(5, 3), (2, 7), (8, 5)}. T...

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  8. Let R be relation from a set A to a set B, then (1)R= AuuB (2)R=AnnB (...

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  9. If A = {2, 4, 6}, then domain of the relation R defined on A is

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  10. Number of relations that can be defined on the set A = {a, b, c} is

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  11. If A and B are two sets such that A xx B = phi, then which of the foll...

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  12. If A = {-1, 1}, then A xx A is equal to

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  13. If A = {x(!) , y(1), z(1)} and B = {x(2), y(2)}, then the number of re...

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  14. If f is a function such that f(0) = 2, f(1) = 3, f(x+2) = 2f(x) - f(x ...

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  15. If f(x) = (x-1)/(x+1), then f(2) is equal to

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  16. If f(x+4) = x^(2) - 1, then f(x) is equal to

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  17. Let X be any non-empty set containing n elements, then the number of r...

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  18. Let A = {2, 3, 5}, B = (10, 12, 15}, then which of the following is a ...

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  19. Which of the following is a function ?

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  20. If f : R rarr R be defined as f(x) = 2x + |x|, then f(2x) + f(-x) - f...

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