Assume that two marbles are drawn without replacement from a box with 1 blue, 3 white, 2 green, and 2 red marbles. Find the probability of the indicated result.
-The second marble is blue, given that the first marble is red.
A) $\frac{1}{8}$
B) $\frac{1}{7}$
C) $\frac{1}{4}$
D) $\frac{2}{7}$

Question

Quizplus · Accepted Answer

If the first marble is red, there are 7 marbles left (1 blue, 3 white, 2 green, 1 red). The probability that the second marble is blue is $\frac{1}{7}$.

Assume That Two Marbles Are Drawn Without Replacement from a Box