When the person is less than 18 years old, out of 265 persons, 20 has job and 245 do not have job.
The probability is defined as [tex] \frac{no\;of \; favourable \;outcomes}{total\;number\;of\;outcomes} [/tex].
Consider the first column only.
The probability that a randomly selected person surveyed has job is
[tex] \frac{20}{20+245} =0.0755 [/tex]
