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diff --git a/911/CH7/EX7.9.a/ex_7_9_a.sce b/911/CH7/EX7.9.a/ex_7_9_a.sce
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+// example 7.9(a)//
+clc
+//clears the screen//
+clear 
+//clears all variables//
+disp('here ABCD = 1011 and G1''=0 and G2''=0')
+r= input('Enter the value of G1'' (0 or 1) : ' ); 
+//accepting the inputs from the user//
+t=input('Enter the value of G2'' (0 or 1): ' );
+sel = input ('Enter the values of ABCD : ' );
+strb = bitcmp(bitand (r,t),1);
+if strb ==0 then
+    //checking whether strobe is high or low//
+if sel ==1100 then
+y= 'The two pulses are steered to the Y12 output ' ;
+else
+y= 'The output Y12 remains in the High state ';
+end
+else
+y='The output Y12 remains in the High state ' ;
+end
+disp (y)
+//displaying result//
+\ No newline at end of file