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+//Chapter 30 Ex2
+clc;
+clear;
+close;
+ //(i)
+ n1=60; r1=3; n2=4; r2=4;
+ f1=factorial(n1)/factorial(n1-r1);
+ f2=factorial(n2)/factorial(n2-r2);
+ mprintf("(i) 60P3=%d\n (ii)4P4=%d",f1,f2);