Question: Three process p 1 , P 2 and P 3 arrive at time zero. Their total execution time is 1 0 ms , 1 5

Three process p1, P2 and P3 arrive at time zero. Their total execution time is 10ms,15ms, and 20ms respectively. They spent first 20% of their execution time in doing I/O, next 60% in CPU processing and the last 20% again doing I/O. For what percentage of time was the CPU free? Use Round robin algorithm with time quantum 5ms.

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