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Answer:
Step-by-step explanation:
Our sample space is the total number of cards in a deck, n(S)=52
Event A: Event that she chooses a three card
Number of 3 cards in a deck, n(A)=4
Event B: Event that she chooses a seven card.
Number of <u>7 cards</u> in a deck, n(B)=4
In Probability, P(A or B)=P(A)+P(B)
The probability that Zhi Qing chooses is either a three or a seven is 2/13.