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diff --git a/1553/CH30/EX30.7/30Ex7.sce b/1553/CH30/EX30.7/30Ex7.sce
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+//Chapter 30 Ex7
+clc;
+clear;
+close;
+
+S={'D','I','R','E','C','T','O','R'};
+sizeS=size(S,"c"); 
+n=6;
+r=2; //since R occurs twice
+noWays=factorial(n)/factorial(r);
+Vowels=3;
+noWaysVowels=factorial(Vowels); //no of ways in which vowels can be arranged
+reqWays=noWaysVowels*noWays;
+mprintf("The required number of ways are %.0f",reqWays);