RS Aggarwal Solution Class 11 Maths Chapter 9 - Combinations

RS Aggarwal Solutions for Class 11 RS Aggarwal Class 11 Maths Solutions 9. Combinations

RS Aggarwal Solution Class 11 Maths Chapter 9 - Combinations

Class 11th|RS Aggarwal - MathematicsChapter 9 - Combinations

Q. 1 A

Evaluate:

²⁰C₄

Q. 1 B

Evaluate:

¹⁶C₁₃

Q. 1 C

Evaluate:

⁹⁰C₈₈

Q. 1 D

⁷¹C₇₁

Q. 1 E

Evaluate:

ⁿ⁺¹C_n

Q. 1 F

Evaluate:

Q. 2

Verify that:

(i) ¹⁵C₈ + ¹⁵C₉ – ¹⁵C₆ – ¹⁵C₇ = 0

(ii) ¹⁰C₄ + ¹⁰C₃ = ¹¹C₄

Q. 3

(i) If ⁿC₇ = ⁿC₅, find n.

(ii) If ⁿC₁₄ = ⁿC₁₆, find ⁿC₂₈.

(iii) If ⁿC₁₆ = ⁿC₁₄, find ⁿC₂₇.

Q. 4

(i) If ²⁰C_r = ²⁰C_r+6, find r.

(ii) If ¹⁸C_r = ¹⁸C_r+2, find ^rC₅.

Q. 5

If ⁿC_r–1 = ⁿC_3r, find r.

RS Aggarwal - MathematicsClass 11th , RS Aggarwal

Chapter 1 - Sets

Chapter 2 - Relations

Chapter 3 - Functions

Chapter 4 - Principle of Mathematical Induction

Chapter 5 - Complex Numbers and Quadratic Equations

Chapter 6 - Linear Inequations (In one variable)

Chapter 7 - Linear Inequations (In two variables)

Chapter 8 - Permutations

Chapter 9 - Combinations

Chapter 10 - Binomial Theorem

Chapter 11 - Arithmetic Progression

Chapter 12 - Geometrical Progression

Chapter 13 - Some Special Series

Chapter 14 - Measurement of Angles

Chapter 15 - Trigonometric, or Circular, Functions

Chapter 16 - Conditional Identities Involving the Angles of a Triangle

Chapter 17 - Trigonometric Equations

Chapter 18 - Solution of Triangles

Chapter 19 - Graphs of Trigonometric Functions

Chapter 20 - Straight Lines

Chapter 21 - Circle

Chapter 22 - Parabola

Chapter 23 - Ellipse

Chapter 24 - Hyperbola

Chapter 25 - Applications of Conic Sections

Chapter 26 - Three-Dimensional Geometry

Chapter 27 - Limits

Chapter 28 - Differentiation

Chapter 29 - Mathematical Reasoning

Chapter 30 - Statistics

Chapter 31 - Probability

Chapter -Objective Questions

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