Pure-sequence probability
In a 13-card rummy hand drawn from two 52-card decks plus two printed jokers, the probability of holding at least one pure run of four consecutive cards of the same suit is approximately 28%. With five or more consecutive cards, the probability drops to roughly 8%.
These figures are the editorial desk's own working numbers; they are not a staking system, a hand selection method or a claim of expected return. They describe the table — not the outcome of a single hand.
Group probability
The probability of holding three or more cards of the same rank in a 13-card hand is approximately 32%. With jokers, the probability rises to nearly 36%.