Discussion
Find the harmonic mean of 2 and 4.
Answer: B
The harmonic mean (H.M.) of n numbers is the reciprocal of the arithmetic mean of their reciprocals.
For two numbers a and b, H.M. = \(\frac{2}{\frac{1}{a} + \frac{1}{b}} = \frac{2ab}{a+b}\).
H.M. = \(\frac{2 \times 2 \times 4}{2+4} = \frac{16}{6} = \frac{8}{3}\).
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development