You have just finished entering the field names for your database. You need to choose the primary key or key field, but none of your fields are unique. What should you do?
o Save the database without a key field.
Let the database assign a unique number in a new field.
o Use one of the existing fields, even if it is not unique.
o Use a spreadsheet instead.

It would be option a

Answer(3375);

Part (a) is relatively straight forward.there are 4 aces in a standard 52-card deck. so the probability that an ace is picked is just 4/52.part (b): note that there are 4 suits in a standard 52-card deck. so picking hearts will be 13/52 or 1/4.part (c): the probability condition or means we need to add the two probabilities because we do not want them simultaneously. so, we end up getting pr(ace) + pr(heart).from part (a), we found that picking an ace had a probability of 4/52, which is reduced down to 1/13.from part (b), we found that picking a heart had a probability of 1/4.so, the probability of an ace or a heart is 1/13 + 1/4 = 4/52 + 13/52 = 17/52.