Given:
One card is drawn from a regular deck of 52 cards.
We will find the following probabilities:
a. The card is a 9.
The number of cards of a 9 = 4
so, the probability of the card is 9 = 4/52 = 1/13
b. The card is a heart.
The number of cards of a heart = 13
So, the probability of a card is heart = 13/52 = 1/4
c. The card is not a 4.
The number of cards of a 4 = 4
So, the probability of the card is not 4 = 1 - 4/52 = 1 - 1/13 = 12/13
d. The card is not a face card.
The number of cards with a face card = 12
So, the probability of the card is not a face = 1 - 12/52 = 1 - 3/13 = 10/13