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diff --git a/1553/CH31/EX31.2/31Ex2.sce b/1553/CH31/EX31.2/31Ex2.sce
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+//chapter 24 Ex 2
+
+clc;
+clear;
+close;
+S={'HH','HT','TH','TT'};
+E={'TT','HT','TH'};
+sizeS=size(S,"c"); sizeE=size(E,"c");
+prob=sizeE/sizeS;
+printf("The probability of getting at most one head is %0.2f",prob);