Multiple choice

What will be the average access time?

  1. 268 units

  2. 293 units

  3. 256 units

  4. 210 units
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A Correct answer
Explanation

Since, each file is referenced with equal frequency and each record in a particular file can be referenced with equal frequency, average access time will be$\dfrac{25 + (50 +40 ) + (50 + 80 + 50) + ......}{6}$Approximately 268 units

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