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X1=75 ; X2=72
Tanda (.) : di kali
•Xgab = (F1.X1 + F2. X2)/ F1+F2
= (14.75+16.72)/14+16
=(1050+1152)/30
=2202/30
=73,4
(1050+1152)/30
2202/30
73,4