A card is drawn at random from a standard pack of 52 cards and hidden behind a screen…

Step 1. The new sample space. The news leaves $12$ equally likely cards.

Step 2. A king. Four of the $12$ are kings. The probability is $\dfrac{4}{12} = \dfrac{1}{3} \approx 0.3333$.

Step 3. A heart. Each suit has three face cards, so three of the $12$ are hearts. The probability is $\dfrac{3}{12} = 0.25$.

Step 4. Red. Hearts and diamonds are red, so $6$ of the $12$ are red. The probability is $\dfrac{6}{12} = 0.5$.