The height of 12 students In a class is 132 cm and the average height of remaining 12 students in the class is 138 cm what is the average height of a student in the class
SUPERSSS25:
I think average height of all the students is to be found !
Not a student in class
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Sigma fixi / Sigma fi = mean
Fixi of remaining 12 students is( 12*138= 1656)
Fixi of first 12 students is( 12 students* 132 =1584)
Mean of total height is 3240/24 = 135
Fixi of remaining 12 students is( 12*138= 1656)
Fixi of first 12 students is( 12 students* 132 =1584)
Mean of total height is 3240/24 = 135
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