Question

you have eight pens in your backpack. three are out of ink. if you select two pens at random, what is the probability that both have ink?

Answer 1

So your n(S) = 8
No. of ink pens=3
P(1st ink pen)=3/8
P(2nd ink pen)=2/7
Required probability=\[\Large \frac{3}{8} \times \frac{2}{7}\]

Answer 2

\[p=\frac{ \left(\begin{matrix}5 \\ 2\end{matrix}\right) }{ \left(\begin{matrix}8 \\ 2\end{matrix}\right) }\]

Answer 3

answer is the same as "DLS" says

Answer 4

=3/28

Answer 5

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