24 |

There are 7 positive examples and 4 negative ones overall, so the
overall entropy is –(7/11)×log_{2}(7/11)
– (4/11)×log_{2}(4/11) which is about
0.94566.

In the exam, you will not have a calculator. You will not,
of course, be expected to work out the logarithms by hand. :-) You
should therefore leave the entropy as an unevaluated expression:
–(7/11)×log_{2}(7/11) – (4/11)×log_{2}(4/11).)

There are 3 values for the **texture** attribute: **smooth**,
**wavy** and **rough**.