Cellphone users in Mapletown were surveyed about their phone plans with these results:
- 70% of all users have call display
- 40% of all users have a data plan
- 75% of users with a data plan also have call display
A cellphone user in Mapletown who is selected at random has call display. Determine the probability that this person also has a data plan.
Could you please show me how to do this using the P(AnB) = P(A)*P(B|A) formula?