42% is the probability that exactly one is paid by the hour.
In statistics, what does a probability mean?
P( exactly one paid by hour ) =
[tex]\frac{71}{100} . \frac{29}{100} + \frac{29}{100} . \frac{71}{100} = \frac{2059 + 2059}{10000}[/tex]
[tex]\frac{4118}{10000} = 42%[/tex]%
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