- #1
Retro95
- 6
- 0
I can easily solve a problem if the probabilities are already defined in the question.. such as P(A|B)
But I always get confused about how to actually define the probability from an application exercise.
E.g..
Market research shows that (A)75% if customers want text messages on their phone, (B)80% want photo capability, (AnB)65% want both.
What are the probabilities that a person who wants text messages also wants photo capability?
Would the formula be
P(A|B)=answer
or
P(B|A)=answer
Also could you please explain in detail how I would know which letter goes first since I always get it confused.
But I always get confused about how to actually define the probability from an application exercise.
E.g..
Market research shows that (A)75% if customers want text messages on their phone, (B)80% want photo capability, (AnB)65% want both.
What are the probabilities that a person who wants text messages also wants photo capability?
Would the formula be
P(A|B)=answer
or
P(B|A)=answer
Also could you please explain in detail how I would know which letter goes first since I always get it confused.