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Consider the following frequency distrib...

Consider the following frequency distribution :
`{:("Class :",0-6,6-12,12-18,18-24,24-30),("Frequency : ",a,b,12,9,5):}`
If mean `= (309)/(22)` and median = 14, then the value `(a-b)^(2)` is equal to __________ .

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