if the sum of fi=60+12a and sum of fixi=2800+640aand mean =60 Find ' – InterviewSolution

1.

if the sum of fi=60+12a and sum of fixi=2800+640aand mean =60 Find 'a'

Answer»

Mean = sum of fixi / sum of fi 60 = (2800+640a)/(60+12a) 3600 + 720a = 2800 + 640a 720a - 640a = 2800 - 3600 80a = -800 a = -800/80 a = -10

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