From a pack of 52 cards, 3 cards are drawn successively with replacement each time. The probability of getting atleast one king is 
 

Given three cards are drawn successively from a pack of 52 cards with replacement.

Now the probability of getting at least one king=1-probability of none of the card drawn is king.

$$\begin{gathered} \Rightarrow =1-\left(\frac{48}{52}\right) \left(\frac{48}{52}\right) \left(\frac{48}{52}\right) \\ =1-{\left(\frac{12}{13}\right)}^3 \end{gathered}$$