CBSE Class 9 Answered
find the missing frequency in following:
Asked by | 31 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 | 31 Jan, 2009, 10:51: PM
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