Pedro observed what customers ordered at his ice cream shop and found the following probabilities:
�
(
vanilla
)
=
0.3
�
(
sundae
)
=
0.2
�
(
vanilla and sundae
)
=
0.15
​

P(vanilla)=0.3
P(sundae)=0.2
P(vanilla and sundae)=0.15
​

Find the probability that a customer ordered vanilla ice cream given they ordered a sundae.