I have read that EMAT when the page fault occurs is =p(PS+MA)+(1-p)(MA)
p is the probability of page fault
i-p is the probability that page is present in Main Memory
PS is the Page fault service time
MA is the memory access time
but according to me first it should check that page is Present in main memory by Page table entry which is present in MM which is going to take one Memory access
So,EMAT should be equals=p(MA+PS+MA)+(1-p)(MA+MA).
why it is not so??