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diff --git a/1553/CH4/EX4.27/4Ex27.sce b/1553/CH4/EX4.27/4Ex27.sce
new file mode 100644
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+//chapter 4 Ex 27
+
+clc;
+clear;
+close;
+firstStation=280;
+secondStation=12;
+thirdStationTotal=248;
+totalBeginning=(((thirdStationTotal-secondStation)/(1/2))-280)/(2/3);
+mprintf("The total number of passengers in the beginning were %0.0f",totalBeginning);