Number of customers = 300 Number of customers that are male and has an open-toe shoes = 11 P(male and open-toe) = 11/300
Number of customers that are male = 139 + 11 = 150 Number of customers that are male and has an open-toe shoes = 11 Given that the customer is male, P(open-toe) = 11/150
No, the two probabilities are not the same. The first probability has 2 variables - the gender and the shoe-type. The second probability has only 1 variable - the shoe-type
