[填空题]
A student is measuritcc3m il,h m m* lec03*jn4*sgng the denh/wimd or+)t0l-*yky sity of a solution. He recorded the data in the for lyt ) 0ym/w*ko-+hdillowing table.
1.Write the expression of the average density of the solution in a fraction form (make sure to include the absolute uncertainties for each physical quantity).
2.Calculate its corresponding uncertainty. Show your work clearly.
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