Following data refers to the jobs (P, Q, R, S) which have

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Following data refers to the jobs (P, Q, R, S) which have arrived at a machine for scheduling. The shortest possible average flow time is ____ days.
Job Processing Time (days)
P 15
Q 9
R 22
S 12

1. 31
2. 32
3. 33
4. 30

Correct Option: A

Near flow time =	Σ c_i	=	124	= 31
	4		4