1.

If mean and variance for the following series of numbers: 15,30,a,25,27,b,13,20 is 20 and 39.5 then the value of 3√ab is

Answer»

If mean and variance for the following series of numbers:
15,30,a,25,27,b,13,20 is 20 and 39.5 then the value of 3ab is



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