Question

In a scientific study there are 8 guinea pigs 3 of which are not pregnant if 3 are selected at random without replacement fins the probability that all are not pregnant Answer the following problems using multiplication rule make sure to reduce your fraction

Answer 1

Determine the probability for the selection of three pigs (without replacement) which are not pregnant.

$\begin{gathered} P=\frac{3}{8}\cdot\frac{2}{7}\cdot\frac{1}{6} \\ =\frac{6}{56\cdot6} \\ =\frac{1}{56} \end{gathered}$

So answer is 1/56.