initial commit / add all books

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+//Caption: Mode of grouped data
+//Example3.10
+//Page47
+clear;
+clc;
+X = [0,2;2,4;4,6;6,8;8,10;10,12;12,14;14,16;16,18];
+f = [10,15,20,30,8,5,4,3,5];
+[Maxf,i]= max(f);
+L = X(i,1); //Lower Limit of the Modal class
+C = diff(X(i,:)); //Width of the class interval
+f1 = abs(f(i)-f(i-1));//Absolute difference between freq. of the modal class and
+//that of its immediately preceding class
+f2 = abs(f(i)-f(i+1));//Absolute difference beween freq. of the modal class and 
+//that of its immediately succeeding class
+Mode = L+((f1/(f1+f2))*C); 
+disp(Mode,'Mode of the annual revenues of the firms is =')
+disp('crores')
+//Result
+//Mode of the annual revenues of the firms is =   
+// 
+//    6.625  
+// 
+// crores
\ No newline at end of file