1.

Consider the following grouped frequency distribution:_x005F_x000D_   x           f_x005F_x000D_ 0-10       8_x005F_x000D_ 10-20     12_x005F_x000D_ 20-30     10_x005F_x000D_ 30-40      p_x005F_x000D_ 40-50      9_x005F_x000D_  _x005F_x000D_ If the mean of the above data is 25.2, then what is the value of p?_x005F_x000D_

A. 9
B. 10
C. 11
D. 12
Answer» D. 12


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