NCERT QUESTION
The sixth H.M. between 3 and
6 / 13 is.
(a) 63/120 (b) 63/12
(c) 126/105 (d) 120/63
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63 / 12o is answer
The harmonic mean between 3 & 6/ 14
H.m. =2ab / a + b = 2 (3)(6/13)/3
6/ 13 = 63 / 120
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