A numbered card is randomly selected from a set of similar cards numbered from 1 to 20. Find the probability of getting a card carrying a multiple of 4.
The probability of an event is the ratio between the number of outcomes of the event and the number of all possible outcomes in the sample space.
To find the probability that a randomly selected card carries a multiple of 4, divide the number of cards with a multiple of 4 by the total number of cards. The multiples of 4 are 4, 8, 12, 16, and 20, so there are 5 cards with a multiple of 4.