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New answer posted•a year ago

Exemplar Solution Maths NCERT Exemplar Solutions Class 11th Chapter Fourteen

The converse of the statement “If x > y, then x + a > y + a” is

(a) If x < y, then x + a < y + a.

(b) If x + a > y + a, then x > y.

(c) If x < y, then x + a > y + a.

(d) If x > y, then x + a < y + a.

2 Views|Posted a year ago

Asked by Payal Gupta

Answered by

Payal Gupta | Contributor-Level 10

a year ago

This is an Objective Type Questions as classified in NCERT Exemplar

$\begin{array}{l} L e t p : x > y \\ a n d q : x + a > y + a \\ p \to q \\ C o n v e r s e o f t h e a b o v e s t a t e m e n t i s q \to p . \\ T h e r e f o r e, i f x + a > y + a t h e n x > y . \\ H e n c e, t h e c o r r e c t o p t i o n i s (b) . \end{array}$

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New answer posted•a year ago

Exemplar Solution Maths NCERT Exemplar Solutions Class 11th Chapter Fourteen

The contrapositive of the statement “If 7 is greater than 5, then 8 is greater than 6” is

(a) If 8 is greater than 6, then 7 is greater than 5.

(b) If 8 is not greater than 6, then 7 is greater than 5.

(c) If 8 is not greater than 6, then 7 is not greater than 5.

(d) If 8 is greater than 6, then 7 is not greater than 5.

2 Views|Posted a year ago

Asked by Payal Gupta

Answered by

Payal Gupta | Contributor-Level 10

a year ago

This is an Objective Type Questions as classified in NCERT Exemplar

$\begin{array}{l} L e t p : 7 i s g r e a t e r t h a n 5 . \\ q : 8 i s g r e a t e r t h a n 6 . \\ ∴ p \to q i . e ., \sim p : 7 i s n o t g r e a t e r t h a n 5 . \\ a n d \sim q : 8 i s n o t g r e a t e r t h a n 6 . \\ S o, \sim p \to \sim q : I f 8 i s n o t g r e a t e r t h a n 6, t h e n 7 i s n o t g r e a t e r t h a n 5 . \\ H e n c e, t h e c o r r e c t o p t i o n i s (c) . \end{array}$

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New answer posted•a year ago

Exemplar Solution Maths NCERT Exemplar Solutions Class 11th Chapter Fourteen

The negation of the statement “101 is not a multiple of 3” is

(a) 101 is a multiple of 3.

(b) 101 is a multiple of 2.

(c) 101 is an odd number.

(d) 101 is an even number.

2 Views|Posted a year ago

Asked by Payal Gupta

Answered by

Payal Gupta | Contributor-Level 10

a year ago

This is an Objective Type Questions as classified in NCERT Exemplar

$\begin{array}{l} L e t p : 101 i s n o t a m u l t i p l e o f 3 . \\ \sim p : 101 i s a m u l t i p l e o f 3 . \\ H e n c e, t h e c o r r e c t o p t i o n i s (a) . \end{array}$

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New answer posted•a year ago

Exemplar Solution Maths NCERT Exemplar Solutions Class 11th Chapter Fourteen

The negation of the statement “Rajesh or Rajni lived in Bangalore” is

(a) Rajesh did not live in Bangalore or Rajni lives in Bangalore.

(b) Rajesh lives in Bangalore and Rajni did not live in Bangalore.

(c) Rajesh did not live in Bangalore and Rajni did not live in Bangalore.

(d) Rajesh did not live in Bangalore or Rajni did not live in Bangalore.

2 Views|Posted a year ago

Asked by Payal Gupta

Answered by

Payal Gupta | Contributor-Level 10

a year ago

This is an Objective Type Questions as classified in NCERT Exemplar

$\begin{array}{l} L e t p : R a j e s h a n d R a j n i l i v e s i n B a n g a l o r e . \\ q : R a j e s h l i v e d i n B a n g a l o r e . \\ a n d r : R a j n i l i v e d i n B a n g a l o r e . \\ ∴ \sim q : R a j e s h d i d n o t l i v e i n B a n g a l o r e . \\ \sim r : R a j n i d i d n o t l i v e i n B a n g a l o r e . \\ S o, \sim (q \lor r) = (\sim q \land \sim r) : R a j e s h d i d n o t l i v e i n B a n g a l o r e a n d R a j n i d i d n o t \\ l i v e i n B a n g a l o r e . \\ H e n c e, t h e c o r r e c t o p t i o n i s (c) . \end{array}$

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New answer posted•a year ago

Exemplar Solution Maths NCERT Exemplar Solutions Class 11th Chapter Fourteen

The negation of the statement “Plants take in CO₂ and give out O₂” is

(a) Plants do not take in CO₂ and do not give out O₂.

(b) Plants do not take in CO₂ or do not give out O₂.

(c) Plants take in CO₂ and do not give out O₂.

(d) Plants take in CO₂ or do not give out O₂.

3 Views|Posted a year ago

Asked by Payal Gupta

Answered by

Payal Gupta | Contributor-Level 10

a year ago

This is an Objective Type Questions as classified in NCERT Exemplar

$\begin{array}{l} L e t p : P l a n t s t a k e i n C O_{2} a n d g i v e o u t O_{2} . \\ q : P l a n t s t a k e i n C O_{2} . \\ a n d r : P l a n t s g i v e o u t O_{2} . \\ ∴ \sim q : P l a n t s d o n o t t a k e i n C O_{2} . \\ \sim r : P l a n t s d o n o t g i v e o u t O_{2} . \\ S o, \sim (q \land r) = (\sim q \lor \sim r) : P l a n t s d o n o t t a k e i n C O_{2} o r d o n o t g i v e o u t O_{2} . \\ H e n c e, t h e c o r r e c t o p t i o n i s (b) . \end{array}$

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New answer posted•a year ago

Exemplar Solution Maths NCERT Exemplar Solutions Class 11th Chapter Fourteen

The negation of the statement “72 is divisible by 2 and 3” is

(a) 72 is not divisible by 2 or 72 is not divisible by 3.

(b) 72 is not divisible by 2 and 72 is not divisible by 3.

(c) 72 is divisible by 2 and 72 is not divisible by 3.

(d) 72 is not divisible by 2 and 72 is divisible by 3.

2 Views|Posted a year ago

Asked by Payal Gupta

Answered by

Payal Gupta | Contributor-Level 10

a year ago

This is an Objective Type Questions as classified in NCERT Exemplar

$\begin{array}{l} L e t p : 72 i s d i v i s i b l e b y 2 a n d 3 . \\ a n d q : 72 i s d i v i s i b l e b y 2 . \\ r : 72 i s d i v i s i b l e b y 3 . \\ ∴ \sim q : 72 i s n o t d i v i s i b l e b y 2 . \\ \sim r : 72 i s n o t d i v i s i b l e b y 3 . \\ S o, \sim (q \land r) : \sim q \lor \sim r \\ \Rightarrow 72 i s n o t d i v i s i b l e b y 2 o r 72 i s n o t d i v i s i b l e b y 3 . \\ H e n c e, t h e c o r r e c t o p t i o n i s (b) . \end{array}$

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New answer posted•a year ago

Exemplar Solution Maths NCERT Exemplar Solutions Class 11th Chapter Fourteen

The negation of the statement “7 is greater than 8” is

(a) 7 is equal to 8.

(b) 7 is not greater than 8.

(c) 8 is less than 7.

(d) none of these

2 Views|Posted a year ago

Asked by Payal Gupta

Answered by

Payal Gupta | Contributor-Level 10

a year ago

This is an Objective Type Questions as classified in NCERT Exemplar

$\begin{array}{l} L e t p : 7 i s g r e a t e r t h a n 8 . \\ \sim p : 7 i s n o t g r e a t e r t h a n 8 . \\ H e n c e, t h e c o r r e c t o p t i o n i s (b) . \end{array}$

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New answer posted•a year ago

Exemplar Solution Maths NCERT Exemplar Solutions Class 11th Chapter Fourteen

The negation of the statement “A circle is an ellipse” is

(a) An ellipse is a circle.

(b) An ellipse is not a circle.

(c) A circle is not an ellipse.

(d) A circle is an ellipse.

2 Views|Posted a year ago

Asked by Payal Gupta

Answered by

Payal Gupta | Contributor-Level 10

a year ago

This is an Objective Type Questions as classified in NCERT Exemplar

$\begin{array}{l} L e t p : A c i r c l e i s a n e l l i p s e . \\ \sim p : A c i r c l e i s n o t a n e l l i p s e . \\ H e n c e, t h e c o r r e c t o p t i o n i s (c) . \end{array}$

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New answer posted•a year ago

Exemplar Solution Maths NCERT Exemplar Solutions Class 11th Chapter Fourteen

The connective in the statement “Earth revolves round the Sun and Moon is a satellite of earth” is

(a) or

(b) Earth

(c) Sun

(d) and

2 Views|Posted a year ago

Asked by Payal Gupta

Answered by

Payal Gupta | Contributor-Level 10

a year ago

This is an Objective Type Questions as classified in NCERT Exemplar

$\begin{array}{l} C o n n e c t i v e w o r d i s " a n d " . \\ H e n c e, t h e c o r r e c t o p t i o n i s (d) . \end{array}$

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New answer posted•a year ago

Exemplar Solution Maths NCERT Exemplar Solutions Class 11th Chapter Fourteen

The connective in the statement

“2 + 7 > 9 or 2 + 7 < 9” is

(a)  and

(b)  Or

(c) >

(d) <

2 Views|Posted a year ago

Asked by Payal Gupta

Answered by

Payal Gupta | Contributor-Level 10

a year ago

This is an Objective Type Questions as classified in NCERT Exemplar

$\begin{array}{l} I n' 2 + 7 > 9 o r 2 + 7 < 9' t h e c o n n e c t i v e i s' o r' . \\ H e n c e, t h e c o r r e c t o p t i o n i s (b) . \end{array}$

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