The following contingency table summarizes the number of students at a college who have a Mastercard or a Visa credit card. (show all the calculations)
Have Visa Don’t have Visa Total
Have MasterCard1,000 1,500 2,500
Don’t have MasterCard 3,000 4,500 7,500
Total4,000 6,000 10,000
Find the probability that a randomly selected student:
(1) Has a Mastercard
(2) Has a VISA
(3) Has both credit cards.
Find the probability that a randomly selected student:
(1) Has a Mastercard or VISA
(2) Has neither credit card
(3) Has exactly one of the two credit cards.





