mean of 25 observations is 36 and the mean of first 13 of the observation is 32 and the mean of last 13 observation is 39 find the 13th observation.
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Hii...
mean=addition of 25 observations/total no. of observations(25)
36=x/25
addition=36*25=900
according to second condition,
32=y/13
addition of 1st 13 observations=13*32=416
39=Z/13
addition of last 13 observations=39*13=507
13th observation=(y+Z)-x
===============(416+507)-900
================923-900====23
mean=addition of 25 observations/total no. of observations(25)
36=x/25
addition=36*25=900
according to second condition,
32=y/13
addition of 1st 13 observations=13*32=416
39=Z/13
addition of last 13 observations=39*13=507
13th observation=(y+Z)-x
===============(416+507)-900
================923-900====23
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mean of 25 observations is 36 and the mean of first 13 of the observation is 32 and the mean of last 13 observation is 39 find the 13th observation.
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