Maintenance of ProductionFacility

A production facility has several 3-D printing machines whichneed maintenance for two reasons. Maintenance type A: a sensor mayhave detected a fault, e.g. an oil leak. Maintenance type B: thequality of the printed product is unacceptable. Each maintenancerequirement occurs at random and independently of otherrequirements for maintenance, with characteristics summarized inthe following table:

Maintenance Type	Average rate of occurrence per week totalled over all 3-Dprinting machines in the production facility	Cost of maintenance
A	6.7 (maintenance events per week)	$430 (per maintenance event)
B	2.1 (maintenance events per week)	$2600 (per maintenance event)

What is the probability of exactly 6 maintenance events of typeA in half a week?

Question 45 options:

	<0.02
	Between 0.02 and 0.04
	Between 0.04 and 0.06
	Between 0.06 and 0.08
	>0.08

Question 46 (1 point)

Maintenance of ProductionFacility

A production facility has several 3-D printing machines whichneed maintenance for two reasons. Maintenance type A: a sensor mayhave detected a fault, e.g. an oil leak. Maintenance type B: thequality of the printed product is unacceptable. Each maintenancerequirement occurs at random and independently of otherrequirements for maintenance, with characteristics summarized inthe following table:

Maintenance Type	Average rate of occurrence per week totalled over all 3-Dprinting machines in the production facility	Cost of maintenance
A	6.7 (maintenance events per week)	$430 (per maintenance event)
B	2.1 (maintenance events per week)	$2600 (per maintenance event)

What is the standard deviation of the total cost of maintenanceof both type A and type B events for one week?

Question 46 options:

	<$2000
	Between $2000 and $4000
	Between $4000 and $6000
	Between $6000 and $8000
	>$8000

Question 47 (1 point)

Maintenance of ProductionFacility

A production facility has several 3-D printing machines whichneed maintenance for two reasons. Maintenance type A: a sensor mayhave detected a fault, e.g. an oil leak. Maintenance type B: thequality of the printed product is unacceptable. Each maintenancerequirement occurs at random and independently of otherrequirements for maintenance, with characteristics summarised inthe following table:

Maintenance Type	Average rate of occurrence per week totalled over all 3-Dprinting machines in the production facility	Cost of maintenance
A	6.7 (maintenance events per week)	$430 (per maintenance event)
B	2.1 (maintenance events per week)	$2600 (per maintenance event)

What is the probability of more than 2 maintenance events oftype B in one week?

Question 47 options:

	<0.2
	Between 0.2 and 0.4
	Between 0.4 and 0.6
	Between 0.6 and 0.8
	>0.8

Question 48 (1 point)

Maintenance of ProductionFacility

A production facility has several 3-D printing machines whichneed maintenance for two reasons. Maintenance type A: a sensor mayhave detected a fault, e.g. an oil leak. Maintenance type B: thequality of the printed product is unacceptable. Each maintenancerequirement occurs at random and independently of otherrequirements for maintenance, with characteristics summarized inthe following table:

Maintenance Type	Average rate of occurrence per week totalled over all 3-Dprinting machines in the production facility	Cost of maintenance
A	6.7 (maintenance events per week)	$430 (per maintenance event)
B	2.1 (maintenance events per week)	$2600 (per maintenance event)

What is the standard deviation of the number of maintenanceevents of type A in one week?

Question 48 options:

	<2
	Between 2 and 4
	Between 4 and 6
	Between 6 an 8
	>8