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closed as a duplicate of: GATE IT 2007 | Question: 58
A  demand paging system take 100 time unit to service a page fault and 300 time units to replace a dirty page.Memory access time is 1 time unit .The probability of a page fault is p . In case of page fault ,the probability of page being dirty also p.It is observed that average access time is 3 times units.Then the value of p is

(a)0.194                                            (b)0.233

(c)0.514                                            (d)0.981
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