1. Choice (c) is correct. y = sin a cos x ⇒dy/dx = d/dx (sin a cos x) = sin a (d/dx)(cos x) = sin a (- sin x) = - sin a sin x  This question related to Chapter 12 maths Class 11th NCERT. From the Chapter 12: Limits and Derivatives. Give answer according to your understanding. For more please visit hereRead more

    Choice (c) is correct.
    y = sin a cos x ⇒dy/dx = d/dx (sin a cos x) = sin a (d/dx)(cos x) = sin a (- sin x) = – sin a sin x 
    This question related to Chapter 12 maths Class 11th NCERT. From the Chapter 12: Limits and Derivatives. Give answer according to your understanding.

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    https://www.tiwariacademy.com/ncert-solutions/class-11/maths/#chapter-12

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  2. Choice (a) is correct.  Comparison of co-efficients of variation determines the variability of two distributions (series).  This question related to Chapter 13 maths Class 11th NCERT. From the Chapter 13: Statistics. Give answer according to your understanding. For more please visit here: https://wwRead more

    Choice (a) is correct. 
    Comparison of co-efficients of variation determines the variability of two distributions (series). 
    This question related to Chapter 13 maths Class 11th NCERT. From the Chapter 13: Statistics. Give answer according to your understanding.

    For more please visit here:
    https://www.tiwariacademy.com/ncert-solutions/class-11/maths/#chapter-13

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  3. Choice (c) is correct. Since each number is equally likely to be chosen so, the sample space has 100 (equally likely) sample points.  Following are the 10 favourable sample points or outcomes: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90 Thus, the required probability = 10/100 = 1/10 This question relatedRead more

    Choice (c) is correct.
    Since each number is equally likely to be chosen so, the sample space has 100 (equally likely) sample points. 
    Following are the 10 favourable sample points or outcomes:
    9, 18, 27, 36, 45, 54, 63, 72, 81, 90
    Thus, the required probability = 10/100 = 1/10
    This question related to Chapter 14 maths Class 11th NCERT. From the Chapter 14: Probability. Give answer according to your understanding.

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    https://www.tiwariacademy.com/ncert-solutions/class-11/maths/#chapter-14

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  4. Choice (c) is correct. If two particular persons sit next to each other then they are considered as a group. So, number of permutations of 7 persons when two particular persons sit together = 6! × 2!/ 7! = 6! × 2! × 1/7 × 6! = 2/7 This question related to Chapter 14 maths Class 11th NCERT. From theRead more

    Choice (c) is correct.
    If two particular persons sit next to each other then they are considered as a group. So, number of permutations of 7 persons when two particular persons sit together = 6! × 2!/ 7! = 6! × 2! × 1/7 × 6! = 2/7
    This question related to Chapter 14 maths Class 11th NCERT. From the Chapter 14: Probability. Give answer according to your understanding.

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    https://www.tiwariacademy.com/ncert-solutions/class-11/maths/#chapter-14

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  5. Choice (c) is correct.  Total number of marbles in the box = 5 + 15 + 25 = 45 Number of non-green marbles = 5 + 15 = 20 Probability (all marbles are non-green) = ²⁰C₅/⁴⁵C₅ This question related to Chapter 14 maths Class 11th NCERT. From the Chapter 14: Probability. Give answer according to your undeRead more

    Choice (c) is correct. 
    Total number of marbles in the box = 5 + 15 + 25 = 45
    Number of non-green marbles = 5 + 15 = 20
    Probability (all marbles are non-green) = ²⁰C₅/⁴⁵C₅
    This question related to Chapter 14 maths Class 11th NCERT. From the Chapter 14: Probability. Give answer according to your understanding.

    For more please visit here:
    https://www.tiwariacademy.com/ncert-solutions/class-11/maths/#chapter-14

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