In a paged memory, the page hit ratio is 0.40. The time required to access a page in secondary memory is equal to 120 ns. The time required to access a page in primary memory is 15 ns. The average time required to access a page is ________.
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Correct answer: D. 78
Explanation
0.40 × 15 + 0.60 × 120 = 6 + 72 = 78 ns.
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