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What is the harmonic mean of two numbers whose geometric mean and arithmetic mean is 8 and 5 respectively

If the first two terms of harmonic progression be 1/2, 1/4, then the harmonic mean of first four numbers is

The arithmetic mean of the scores of a group of students in a test was 52. The brightest 20% of them secured a mean score of 80 and the dullest 25% a mean score of 31. The mean score of remaining 55%

The arithmetic mean of the scores of a group of students in a test was 52. The brightest 20% of them secured a mean score of 80 and the dullest 25% of a mean score of 31. The mean score of remaining 5

Let the harmonic mean and the geometric mean of two positive numbers be in the ratio 4 : 5. The two numbers are in the ratio

Maximum displacement from mean position of a body performing simple harmonic mean is called

The ratio of the harmonic mean to the geometric mean of two positive numbers is 12/13. The number are in the ratio

A voltage wave having 5% fifth harmonic content is applied to a series RC circuit. The percentage fifth harmonic content in the current wave will be

A voltage wave containing 10% third harmonic is applied to a scries R-L circuit. The percentage third harmonic content in the current wave will be

Assertion (A): Relaxation time and mean time between collisions are equal when scattering is isotropic.Reason (R): Mean free path of an electron λ, velocity of electron v and mean time between collis

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