Consider two different implementations, P$1$ and P$2,$ of the same instruction set. There are three classes of instructions $(A,B$ and $C)$ in the instruction set. P$1$ has a clock rate of $3\mathrm{.}0GHz$ and P$2$ has a clock rate of $2\mathrm{.}55GHz.$ The average number of cycles for each instruction class and their frequencies $($for a typical program$)$ are as follows:

$\backslash$table$[[$Instruction Class,$\backslash$table$[[$Machine P$1-],[$Cycles$/$Instruction$],[$Class$]],\backslash$table$[[$Machine P$2-],[$Cycles$/$Instruction$],[$Class$]],$Frequency$],[2,1,50\%$