NDA2023MathematicsSequences and SeriesActual
If H is the Harmonic Mean of three numbers ¹⁰ C ₄, ¹⁰ C ₅ , and ¹⁰ C ₆ , then what is the value of 270 H ?
Options
- A1
- B14 17
- C17 14
- D1 31
Correct answer
C. 17 14
Step-by-step solution
Since, Harmonic Mean (H) H = 3 1 ¹⁰ C ₄ + 1 ¹⁰ C ₅ + 1 ¹⁰ C ₆ H= 3 1 210 + 1 252 + 1 210 = 3 105 252 357 Hence, 270 H = 17 14