Consider a system that uses demand paging with the following characteristics: the base $($hardware$)$ memory access time is $100$ nanoseconds, the page$-$fault service time is $10$

milliseconds, and the Effective Access Time $($EAT$)$ is $120$ nanoseconds. What is the page$-$fault rate?

Give your answer either as a simple decimal $($eg $0\mathrm{.}0075)$ or using E$-$notation $($eg $7\mathrm{.}5$E$-3,$ which is another way of writing $7\mathrm{.}5{10}^{-3}).$

Answer: