Question

In a statistics class of 39 students, 10 have volunteered for community service in the past. If two students are selected at random from this class, what is the probability that both of them have volunteered for community service?Round your answer to four decimal places.

Answer 1

The probability that both of them have volunteered for community service:

$=\frac{10}{39}\times\frac{9}{38}$

Solving further, we will have:

$\begin{gathered} 0.256410\times0.236842 \\ =0.0607287 \\ =0.0607(to\text{ 4 d.p)} \\ \text{The number above is our final answer.} \end{gathered}$