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Is it true that the oxidation number of an ion is equal to its protons subtracting its electrons? Let X1 & X2 have joint pmf p(x1, x2)=(x1x2)/36. 0 otherwise Find joint pmf of Y1=X1X2 and Y2=X2? Find integers x and y such that 57x+79y=17, and 400 Why erythrocytes have a light section in the middle? What town is this prefix number for 869 ?