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KCET2024MathematicsPermutation and Combination

The value of ⁴⁹ C₃+ ⁴⁸ C₃+ ⁴⁷ C₃+ ⁴⁶ C₃+ ⁴⁵ C₃+ ⁴⁵ C₄ is

Options

  1. A⁵⁰ C₄
  2. B⁵⁰ C₃
  3. C⁵⁰ C₂
  4. D⁵⁰ C₁

Correct answer

A. ⁵⁰ C₄

Step-by-step solution

^n C_r+ ^n C_ r+1 = n+1 r+1 Given, ⁴⁹ C₃+ ⁴⁸ C₃+ ⁴⁷ C₃+ ⁴⁶ C₃+ ⁴⁵ C₃+ ⁴⁵ C₄= ⁴⁹ C₃+ ⁴⁸ C₃+ ⁴⁷ C₃+ ⁴⁶ C₃+ ⁴⁶ C₄= ⁴⁹ C₃+ ⁴⁸ C₃+ ⁴⁷ C₃+ ⁴⁷ C₄= ⁴⁹ C₃+ ⁴⁸ C₃+ ⁴⁸ C₄= ⁴⁹ C₃+ ⁴⁹ C₄= ⁵⁰ C₄

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