Compute Probabilities Using the General Multiplication Rule
-Numbered disks are placed in a box and one disk is selected at random. If there are 3 red disks numbered 1 through 3 , and 2 yellow disks numbered 4 through 5 , find the probability of selecting a disk numbered 3 , given that a red disk is selected.
A) $\frac { 1 } { 3 }$
B) $\frac { 3 } { 5 }$
C) $\frac { 1 } { 5 }$
D) $\frac { 2 } { 5 }$

Question

Quizplus · Accepted Answer

Given that a red disk is selected, there are 3 red disks in total. Since only one of these is numbered 3, the probability of selecting the disk numbered 3, given that a red disk is selected, is $\frac{1}{3}$.

Compute Probabilities Using the General Multiplication Rule -Numbered Disks Are 13\frac { 1 } { 3 }31​

Compute Probabilities Using the General Multiplication Rule
-Numbered Disks Are $\frac { 1 } { 3 }$