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The contrapositive of "if x is old then ...

The contrapositive of "if x is old then x is clever", is

A

If x is clever then x is old

B

If x is not old then x is not clever

C

If x is not clever then x is not old

D

If x is not clever then x is old

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The correct Answer is:
C
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DIPTI PUBLICATION ( AP EAMET)-MATHEMATICAL REASONING [APPENDIX - 4]-Exercise
  1. The converse of "if x is old then x is clever", is

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  2. The inverse of "if x is old then x is clever", is

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  3. The contrapositive of "if x is old then x is clever", is

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  4. p : he is hard working , q : he will win. The symbolic form of" he is ...

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  5. p : he is hard working, q : he will win. The symbolic form of" if he i...

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  6. p : he is hard working, q : he will win. The symbolic form of" if he w...

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  7. p : She is beautiful, q : she is intelligent. The symbolic form of" sh...

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  8. p : She is beautiful, q : she is intelligent. The symbolic form of" if...

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  9. p : she is beautiful, q : she is intelligent. The symbolic form of "if...

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  10. p : she is beautiful, q : she is happy. The symbolic form of "if she i...

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  11. p : he is hard working , q : he is intelligent. Then (~q) rArr (~p) me...

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  12. p : she is beautiful, q : she is intelligent. Then (~p) vv (~q) means

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  13. p : she is beautiful, q : she is happy. Then (~p) rArr (~q) means

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  14. p : she is beautiful , q : she is happy. Then q rArr (~p) means

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  15. The truth table of ~(~p) is

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  16. The truth table of p vv q is

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  17. The truth table of p ^^ q is

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  18. The truth table of p rArr q is

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  19. The truth table of p hArr q is

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  20. The truth table of (~p) ^^ q is

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