Question

For the experiment of rolling a single fair die, find the probability of obtaining not less than 5:The probability of obtaining not less than 5 is?

Answer 1

solution:

In a fair die, there are 6 possible outcomes;

The probability of obtaining less than 5 is;

$\begin{gathered} P(less\text{ }than\text{ }5)=\frac{n(lessthanfive)}{n(total)} \\ \\ P(less\text{ }than\text{ }5)=\frac{4}{6} \end{gathered}$

Thus, the probability of not less than 5 is;

$\begin{gathered} P(not\text{ }less\text{ }than\text{ }5)=1-\frac{4}{6} \\ \\ P(not\text{ }less\text{ }than\text{ }5)=\frac{2}{6} \\ \\ P(not\text{ }less\text{ }than\text{ }5)=\frac{1}{3} \end{gathered}$

ANSWER:

$\frac{1}{3}$