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diff --git a/196/CH3/EX3.12/example_3_12.sce b/196/CH3/EX3.12/example_3_12.sce
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+++ b/196/CH3/EX3.12/example_3_12.sce
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+//Chapter 3
+//Example 3-12
+//ProbOnOutputvoltage 
+//Page 57
+clear;clc;
+//Given
+R1=100000;R2=100000;R3=100000;R=100000//in ohm
+Rf=33*10^3;//in ohm
+E1=5;E2=5;E3=-1;//in volts
+n=3;//number of inputs
+Vout=-(E1+E2+E3)/n;//output voltage
+printf("\n\n Value of output voltage =  %.4f V \n\n",Vout)
+\ No newline at end of file
diff --git a/196/CH3/EX3.12/result_3_12.txt b/196/CH3/EX3.12/result_3_12.txt
new file mode 100755
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+ Value of output voltage =  -3.0000 V 
+\ No newline at end of file