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diff --git a/147/CH2/EX2.15/Example2_15.sce b/147/CH2/EX2.15/Example2_15.sce
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+close();
+clear;
+clc;
+Vs = 100; //V
+Is = 10; //A
+R1 = 5; //ohm
+R2 = 10; //ohm
+R3 = 30; //ohm
+R4 = 5; //ohm
+V2 = 90; //V
+R = 20;
+//When all current sources are open circuited and voltage sources are short circuited
+R20 = (R1+R2)*R3/(R1+R2+R3); 
+Rn = R20;
+//current contribution due to 100 V source
+In1 = Vs/R3;
+//current contribution due to 10 A source
+In2 = Is*(R1)/(R1+R2); //A
+//by supersition principle 'In'
+In = In1+In2; //A
+//resistance seen by voltage source,  'Re'
+Re1 = (R1+R2)*R3/(R1+R2+R3) + R4;
+I1 = V2/Re1;
+//by current division, ammeter reading 'Ia'
+Ia = R3*I1/(R1+R2+R3);
+Re2 = (R1+R2) + (R3*R4)/(R3+R4); //ohm
+I2 = V2/Re2; //A
+//current in 20 ohm resistor 'I20'
+I20 = In*(R2/(R2+R)); //A
+mprintf("Current in 20 ohm resistance, I20 = %0.2f A",I20);
+\ No newline at end of file