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 white.
A) $\frac { 1 } { 7 }$
B) $\frac { 1 } { 8 }$
C) $\frac { 3 } { 8 }$
D) $\frac { 3 } { 7 }$

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 white. 
A) $\frac { 1 } { 7 }$
B) $\frac { 1 } { 8 }$
C) $\frac { 3 } { 8 }$
D) $\frac { 3 } { 7 }$

Quizplus · Accepted Answer

Given the first marble drawn is white, there are now 7 marbles left (2 white, 2 green, 2 red, 1 blue). The probability the second marble is blue is therefore 1 out of these 7, or $\frac{1}{7}$.

Two Marbles Are Drawn Without Replacement from a Box with 3