Probability
From Conservapedia
The probability of an event is a number between 0 (representing impossibility) and 1 (representing certainty), and may be expressed as a simple fraction, decimal fraction, or percentage. When there are a finite number of equally likely outcomes, the probability of an event is given by
![\mbox{Prob}[\mbox{event}]
=\frac{\mbox{number of favourable outcomes}}{\mbox{number of possible outcomes}}](images/math/a/2/0/a20a12889997901e0f6e2b9e98c7aab1.png)
.
For example, the probability of a tossed fair coin coming up heads is ½ = 0.5 = 50% because there is one favourable outcome (heads) out of 2 possible outcomes (heads and tails).
With a standard deck of 52 playing cards, there are 13 cards in each suit: spades, hearts, clubs and diamonds. After the deck is shuffled thoroughly, the probability that the top card on the deck is a heart is 13 / 52 = 1 / 4 = 0.25, or 25%.
