Demand Paging

Question

Consider a system where main memory access time is 10 msec and page fault service time is 200 msec. The TLB is added to improve the performance and the 80% references are found in the TLB and that of the remaining 10% cause page fault. The TLB access time and page table access time are negligible then What is Effective memory access time?

Answer given is 13.8ms but I am getting 14ms. I am evaluating as follows, Where am I doing wrong?

EMAT=0.8*(10)+0.2[0.9*10 + 0.1*(10+200)]

Answer 1

in your above step when there is tlb miss nnd under this there is page fault then first  we need to bring this page in memory using concept demand paging having  a service tym which also includes access tym so no need to add 10 in(200+10)....