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tai ** (R)
1 The radices of the cylindrical rock core is 1cm, the length
is 5cm, and the viscosity of the oil is impa. s. The Pressure
difference between the two ends of the rock core 15 0-2
atmospheric pressure and we get 15 cm3 oil from the outlet
in 2 minutes, Please find permeability of the rock core.

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18}, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.