Random variable, an Uncommon card

The card carries these facts from its Wikipedia article.

• The term 'random variable' in its mathematical definition refers to neither randomness nor variability but instead is a mathematical function in which the domain is the set of possible outcomes in a sample space (e.g. the set { H, T }, and the range is a measurable space.
• Typically, the range of a random variable is a subset of the real numbers.
• Informally, randomness typically represents some fundamental element of chance, such as in the roll of a die, it may also represent uncertainty, such as measurement error.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Random variable article was read about 120,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 74 and blocks with 51: each hit it takes is cut by 20 %.

Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.

The cards just above and just below Random variable in the power ranking, all domains together.