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diff --git a/1553/CH4/EX4.21/4Ex21.sce b/1553/CH4/EX4.21/4Ex21.sce
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+//chapter 4 Ex 21
+
+clc;
+clear;
+close;
+rent=2/5; food=3/10; conveyance=1/8; Amtleft=1400;
+PartLeft=1-(rent+food+conveyance);
+salary=Amtleft/PartLeft;
+eFood=food*salary;
+eConveyance=conveyance*salary;
+printf("The expenditure on food is Rs. %3.0f and that on conveyance is Rs. %3.0f",eFood,eConveyance);