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2 black tens in a deck of cards.
A standard 52 cards deck contains 4 kings and 4 tens. Given that the type of the card does not matter, we have a total of 8 valid cards (4 kings + 4 tens) to choose from a 52 cards deck. Hence the probability is 8/52.
7% chance --------------------------------------------------------------------------------------------- There are 4 tens in a deck of 52 cards. So the probability of drawing a ten from the deck is P(x=10) = 4/52 = 0.0769230... P(x=10) ≈ 7.69%.
The probability of drawing two jacks and three tens of any suite from a standard deck of cards is: 5C2 ∙ (4/52)∙(3/51)∙(4/50)∙(3/49)∙(2/48) = 0.00000923446... ≈ 0.0009234% where 5C2 = 5!/[(5-2)!∙(2!)] = 10
A deck of cards consists of 52 cards. Each card is available four times. That makes 13 diffent card types. Four different cards are worth 10 points: 10, Jack, Queen, King. That means that 4x4 Cards out of 52 are worth ten. That are about 30% (30/100). Two tens in a row have the expectation of 30%x30% which is about 9%.