The probability of selecting a 6, given that a blue disk is selected is given by the following formula:
There are 4 blue in : 1, 2 , 6, 8
P(A)= blue disk selected:
P(B)= 6 is selected
Where P(B) is the probablity to select the number 6 in four blue disks.
Substituing:
Answer: The probablity to select a 6, given that a blue disk was selected is: 1/4.