If a card is chosen from a standard deck of cards, what is the probability of getting a five or a seven?
In a standard deck of cards, there are 4 fives and 4 sevens (one five and one seven of each suit).
The total number of cards in a standard deck is 52.
Therefore, the probability of getting a five or a seven would be (4 + 4) / 52 = 8 / 52 = 2 / 13.
So, the probability of getting a five or a seven is 2/13.
To calculate the probability of getting a five or a seven, we need to determine the total number of favorable outcomes (number of fives or sevens) and divide it by the total number of possible outcomes.
Total number of fives in a standard deck: There are four fives in a deck (one in each suit: hearts, diamonds, clubs, spades).
Total number of sevens in a standard deck: There are four sevens in a deck (one in each suit: hearts, diamonds, clubs, spades).
Total number of favorable outcomes: Since we want to get either a five or a seven, we can add the total number of fives and sevens: 4 + 4 = 8.
Total number of cards in a standard deck: A standard deck contains 52 cards.
Therefore, the probability of getting a five or a seven is 8/52, which simplifies to 2/13, or approximately 0.154.
So, the probability of getting a five or a seven from a standard deck of cards is approximately 0.154.