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# Probability of a Complement

SATSTM-EYZYXF

A manufacturer has determined that a machine averages one faulty unit for every $1000$ it produces.

What is the probability that an order of $250$ units will have one or more faulty units?

A

$0.779$

B

$0.673$

C

$0.514$

D

$0.25$

E

$0.221$