Posted: Fri Feb 24, 2006 10:00 pm Post subject: Fusion
Thanx,
(D) Due to modernization, Speed of the Express has grown up in last 4 years by 10, 15, 20 and 25 km/hr. What is the annual average growth of speed (km/hr)
(Ans) Arithmetic Mean = 17.5 km/hr
(E) Due to modernization, Speed of the Express has grown in last 4 years by 10 %, 15 %, 20 % and 25 %. What is the annual average growth of speed ( % ).
(Ans) Geometric Mean (Growth factors) = 17.3668 %
There is a close connection between the two means. The log of the geometric mean of a set of speeds is the arithmetic mean of the logs of the speeds.
Posted: Sun Mar 19, 2006 3:00 am Post subject: Re: Fusion
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(E) Due to modernization, Speed of the Express has grown in last 4 years by 10 %, 15 %, 20 % and 25 %. What is the annual average growth of speed ( % ).
Posted: Mon Mar 20, 2006 8:21 pm Post subject: TSD
banter wrote:
(E) Due to modernization, Speed of the Express has grown in last 4 years by 10 %, 15 %, 20 % and 25 %. What is the annual average growth of speed ( % ).
