subjective method classical method posterior method If P(A) = 0.4, P(B|A) = 0.35, P(A B) = 0.69, then P(B) = 0.14 0.43 0.75 0.59 Each customer entering a department store will either buy or not buy some merchandise. An experiment consists of following 4 customers and determining whether or not they purchase any merchandise. How many sample points exist in the above experiment? (Note that each customer is either a purchaser or non-purchaser.) 2 4 12 16