You want to obtain cash by using the ATM Machine, but it's dark and you cant see your card? The card should be inserted with front side up and the printing configured so that beginning of your name enters first..
a] Determine the probability of selecting a random position and inserting the card, with the result that the card is inserted correctly?
b] What is the probability of randomly selecting the card's position and finding that it is incorrectly inserted on the first attempt, but it is correctly inserted on the second attempt? c] How many random selections are required to be absolutely sure that the card works because it is inserted correctly?