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X and Y decay at same rate always X will decay faster than YY will decay faster than XX and Y have same decay rate initially

Answer :

cSolution :

`T_X=T_(Y(avg)) = 1.44 T_Y` <br> i.e. `T_X gt T_Y therefore lambda_X lt lambda_Y` <br> `because R=lambdaN` and N is same for both, `therefore R_X lt R_Y` or `R_Y gt R_X` <br> i.e. Y will decay faster than X.