Question

What is the probability of choosing a king in a deck of 52 cards?

Answer 1

K) = 4/51 since there are four aces in the deck but only 51 cards left after the king has been removed. WITH REPLACEMENT: Find the probability of drawing three queens in a row, with replacement. We pick a card, write down what it is, then put it back in the deck and draw again.

Answer 2

Probability is the ratio of no. of favorable/desired outcomes to the total outcomes possible, in this case desired outcome is king. As there are 4 kings, so favorable outcomes are 4. Now as there are 52 cards, so there can be 52 outcomes in total. 
so probability of choosing a king is = 4/52.