A consumer organization estimates that over a​ 1-year period 18​% of cars will need to be repaired​ once, 5​% will need repairs​ twice, and 4​% will require three or more repairs. What is the probability that a car chosen at random will need ​a) no​ repairs? ​b) no more than one​ repair? ​c) some​ repairs?

MATLAB: An Introduction with Applications
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A consumer organization estimates that over a​ 1-year period
18​%
of cars will need to be repaired​ once,
5​%
will need repairs​ twice, and
4​%
will require three or more repairs. What is the probability that a car chosen at random will need
​a) no​ repairs?
​b) no more than one​ repair?
​c) some​ repairs?
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