To distribute \( 500 \) distinct boxes equally among \( 50 \) individuals, such that each person receives \( 10 \) boxes, the number of possible distributions is calculated using the formula: \[ \frac{500!}{(10!)^{50}}. \] This formula arises because: - The \( 500! \) term represents the total permutations of all \( 500 \) distinct boxes. - For each of the \( 50 \) individuals, the \( 10 \) boxes they receive can be internally arranged in \( 10! \) ways. - To correct for overcounting due to the identical distribution patterns among individuals, we divide by \( (10!)^{50} \), accounting for the \( 10! \) arrangements for each of the \( 50 \) recipients.
Final Answer: \[ \boxed{\frac{500!}{(10!)^{50}}} \]