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

Question

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

Quizplus · Accepted Answer

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

Two Marbles Are Drawn Without Replacement from a Box with 3