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diff --git a/2465/CH3/EX3.4/Ex3_4.sce b/2465/CH3/EX3.4/Ex3_4.sce
deleted file mode 100644
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@@ -1,23 +0,0 @@
-//Chapter-3,Example 4,Page 57
-clc;
-close;
-
-m=234  // atomic mass of uranium
-
-M_0 = 4   // initial mass of uranium
-
-t_half= 2.48*10^5  // half life of uranium 
-
-t= 62000*365*24*3600  // time period
-
-lamda=8.88*10^-14
-
-M= M_0*exp(-lamda*t)
-
-printf('Mass of uranium left unchanged is %.3f mg', M)
-
-N= (M*6.023*10^20)/m
-
-A= lamda*N
-
-printf(' \n activity of uranium is %.3f disintigrations/sec ', A)