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diff --git a/911/CH7/EX7.3/ex_7_3.sce b/911/CH7/EX7.3/ex_7_3.sce
new file mode 100644
index 000000000..f752cb3fb
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+++ b/911/CH7/EX7.3/ex_7_3.sce
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+//example 7. 3//
+clc
+//clears the screen//
+clear
+//clears all existing variables//
+m (1) =16;
+//taking the given values//
+m (2) = log2 (m (1) ) 
+//making necessary calculations
+m (3) =m(2) -1;
+m (4) =m(1) /2;
+printf ('A %d-to-1 multiplexer requires ' ,m(1));
+printf( '%d select lines , The lower ',m(2));
+printf ( ' %d select lines choose ',m(3));
+printf ( ' %d-to-1multiplexer outputs. The 2 to 1 multiplexers chooses one of the output of two ' ,m(4));
+printf ( '%d-to-1 multiplexers depending on what appears in the ' ,m(4));
+printf ( ' %dth select line.', m (2) );
+//displaying the result//
+\ No newline at end of file