Questions asked by Rajnandni

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• If the AM and GM for 10 observations are both 15 then the value of harmonic mean......?
  
• If there are two groups with 75 and 65 as harmonic mean and containing 15 and 13 observations then the combined harmonic mean....?
  
• What is the HM of 1,1/2,1/3.....1/n?
  
• An aeroplane flies from A to B at the rate of 500 km/ hour and comes back from B to A at the rate of 700 km/ hour. The average speed of the aeroplane is......?
  
• If arithmetic mean b/w two no is 64 and the geometric mean is 16 the harmonic mean b/w them is.....?
  
• $100 will become after 20 years at 5% p.a compound interest amount of. .....?