Question

What is [p(a or b)], the probability that the card zhi qing chooses is either a three or a seven?

Answer 1

To find the probability that the card Zhi Qing chooses is either a three or a seven, we need to calculate P(a or b).For example, if there are 4 threes and 4 sevens in the deck, and a total of 52 cards, then the probability is:

P(a or b) = (4 + 4) / 52 = 8 / 52 = 2 / 13

Step-by-step explanation:

To find the probability that the card Zhi Qing chooses is either a three or a seven, we need to calculate P(a or b). Let's break it down:

1. Identify the sample space of possible outcomes. In this case, the sample space is all the cards in the deck.
2. Count the number of favorable outcomes.
3. In this case, the favorable outcomes are the cards that are either a three or a seven.
4. Calculate the probability by dividing the number of favorable outcomes by the total number of possible outcomes.

For example, if there are 4 threes and 4 sevens in the deck, and a total of 52 cards, then the probability is:

P(a or b) = (4 + 4) / 52

= 8 / 52

= 2 / 13