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tlb and page fault

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A demand paging system takes 250 time units to service a page fault and 450 time units to replace a dirty page. Memory access time is 10 time units. The probability of page faults is 0.3. In case of a page fault, the probability of page being dirty is 0.06. The average access time is ________ time units (Upto 1 decimal place)
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