here when we calculate time if the write operation has to be performed then
according to me we have to calculate it in following way-
EMAT =0.8*(0.9*(100)+0.1*(100+1000)) + 0.2(100 +1000)
i have included time to write in main memory as well as cache, because if we have to perform write operation then the cache has to update too.
here is the question and they have not included cache time,
is there anything wrong in my approach if it is the please correct me