# Probability : Complements

1. Your department just shipped 100 engines, and all of them were free of defects. Please tell me which of the following written descriptions is the complement of this event? (Be careful-I HIGHLY suggest referring to the text one more time. This one is really tricky-but the answer is in the test!)

a. All of the engines are defective.

b. At least one of the engines is defective.

c. None of the engines are defective.

2. Express the degree of likelihood as a probability value. "You have a 50-50 chance of choosing the correct answer." Whew-easy point! You are NOT allowed to get this one wrong! :-).

a. 0.25

b. 0.50

c. 0.90

d. 50

https://brainmass.com/math/probability/probability-complements-37951

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1. Back to the notion of terminology again! Your department just shipped 100 engines, and all of them were free of defects. Please tell me ...

#### Solution Summary

Complements and complementary events are investigated. The solution is detailed and well presented. The response received a rating of "5" from the student who originally posted the question.