Four fair coins are to be flipped. What is the probability that all four will be heads or all four will be tails? Express your answer as a common fraction.
A standard deck of 52 cards has 13 ranks (Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King) and 4 suits (,
,
, and
), such that there is exactly one card for any given rank and suit. Two of the suits (
and
) are black and the other two suits (
and
) are red. The deck is randomly arranged. What is the probability that the top card is a 5?