Suppose we receive the following two processes at time $0$ in the given order and use FIFO scheduling.

The numbers below show the CPU burst, IO burst, CPU burst values for each process.

$P1$: $25,15,20$

$P2$: $10,20,10$

Assuming that we have a single CPU and multiple IO devices $($i$.$e$.,$ no waiting for IO$).$ Then what would be the CPU utilization if we use

No multiprogramming vs$.$ Multiprogramming.

CPU utilization in the case of

No multiprogramming vs$.$ Multiprogramming

$70\%$

vs$.$

$(\frac{85}{100})**100=85\%$

$65\%$

vs$.$

$(\frac{65}{70})**100=92\mathrm{.}85\%$

$60\%$

vs$.$

$(\frac{65}{100})**100=65\%$

$65\%$

vs$.,(\frac{60}{80})**100=75\%$