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jmc

prealgebra senior

Problem

A card is drawn at random from a standard 52-card deck. What is the probability that it is an odd number (3,5,7,9) or a (or both)?
Solution
There are 16 odd-numbered cards, namely 4 suits for each of the 4 odd digits. There are 13 s, but 4 of these we already counted among the odd-numbered cards. So the total number of cards that are odd or a is , and the probability is .
Final answer
\dfrac{25}{52}