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) |
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Option: B Explanation : Click on Discuss to view users comments. |
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 |
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Option: D Explanation : Click on Discuss to view users comments. |
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 |
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Option: B Explanation : Click on Discuss to view users comments. |
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) |
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Option: D Explanation : Click on Discuss to view users comments. |
