find the missing frequency in following:

Asked by  | 31st Jan, 2009, 08:31: PM

Expert Answer:

mean is given by  fx /  f  = 20.6

so   fx = 10.3 + 15.10 + 20.y + 25.7 + 35.5 = 530 + 20 y 

 f = 25 + y

solving we get  (530 + 20 y ) / (25 + y ) = 20.6  we get y = 25

Answered by  | 31st Jan, 2009, 10:51: PM

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