B) What is the probability that a randomly selected card is diamond or heart from a standard deck of 52 cards?

A standard deck of 52 cards consists of 4 suits: hearts, diamonds, clubs, and spades. Each suit has 13 cards: A, 2, 3, 4, 5, 6, 7, 8, 9, 10, J, Q, K.

Step 1: Identify the total number of outcomes. In this case, the total number of outcomes is the total number of cards in the deck, which is 52.

Step 2: Identify the number of favorable outcomes. The favorable outcomes are the outcomes where the card drawn is a diamond or a heart. Since each suit has 13 cards, there are 13 diamonds and 13 hearts in the deck. So, the total number of favorable outcomes is 13 (diamonds) + 13 (hearts) = 26.

Step 3: Calculate the probability. The probability of an event is given by the ratio of the number of favorable outcomes to the total number of outcomes. So, the probability that a randomly selected card is a diamond or a heart is 26 (favorable outcomes) / 52 (total outcomes) = 0.5 or 50%.