Exercise 8 Page p36

To calculate the probability of choosing a pentagon, we use the Probability Formula.

P = \frac{Number of favorable outcomes}{Number of possible outcomes}

In our exercise the number of possible outcomes is

6,

as we have six polygons. Among them there is one pentagon, so the number of favorable outcomes is

1 .

Now we can calculate

P (pentagon) .

P = \frac{Number of favorable outcomes}{Number of possible outcomes}

Substitute values

P (pentagon) = \frac{1}{6}

The probability of picking a pentagon is

\frac{1}{6} .