Sign In
Recall that the experimental probability of the event is calculated by the dividing number of event occurrences by the number of trials.
3/13 or 23.1 %
When calculating the experimental probability, we are comparing the number of times the event occurs to the number of times the experiment is done.
P=Times the Event Occurs/Times the Experiment Is Done
This is very similar to the Probability Formula. There are 52 cards in a standard deck of cards, which is also the number of times the experiment is done.
In the deck, there is a total of 3 club face cards, 3 diamond face cards, 3 spade face cards, and 3 heart face cards. The sum of these values is the number of times the event occurs. 3+3+3+3= 12 face cards Now we have enough information to calculate P(Face card).
Substitute values
a/b=.a /4./.b /4.
Calculate quotient
Round to 3 decimal place(s)
Convert to percent
The probability of choosing a face card is equal to 313 or about 23.1 %.