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Consider a computer system that has cache memory, main memory (RAM) and disk, and OS uses virtual memory. It takes 2 nsec to access a word from the cache, 10 nsec to access a word from RAM, and 10 msec to access a word from the disk. If the cache hit rate is 95% and main memory hit rate is 99%, what is average time to access a word? *1/15,000.495 nsec5,001.9 nsec2.395 nsec5,002.395 nsec
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