The number of ways of selecting 2 cards from a deck of 52 playing cards such that both cards are kings equals _____.
Step-by-Step Solution
Key Concept: There are 4 kings in a deck — count the number of ways to choose 2 of them using combinations, $\binom{4}{2}$.
The detailed step-by-step mathematical proof is available inside the Mathbee app workspace.
Correct Answer: 6