Compute At-Least Probabilities
-Numbered Disks Are Placed in a Box $\frac { 1 } { 2 }$

Multiple Choice

Compute At-least Probabilities
-Numbered disks are placed in a box and one disk is selected at random. If there are 6 red disks numbered 1 through 6 , and 4 yellow disks numbered 7 through 10 , find the probability of selecting a yellow disk, given that the number selected is less than or equal to 3 or greater than or equal to 8 .

A) $\frac { 1 } { 2 }$
B) $\frac { 3 } { 4 }$
C) $\frac { 3 } { 5 }$
D) $\frac { 3 } { 10 }$