Question

These marbles are placed in a bag and two

Answer 1

Answer:

$Pr = \frac{1}{45}$

Step-by-step explanation:

Given

$Black =5$

$Pink = 2$

$Blue = 3$

Required

$P(Pink\ and\ Pink)$

This is calculated as:

$Pr = P(Pink) * P(Pink)$

Because it is a selection without replacement, the probability is:

$Pr = \frac{n(Pink)}{Total} * \frac{n(Pink) - 1}{Total - 1}$

$Pr = \frac{2}{10} * \frac{2 - 1}{10 - 1}$

$Pr = \frac{2}{10} * \frac{1}{9}$

$Pr = \frac{1}{5} * \frac{1}{9}$

$Pr = \frac{1}{45}$