$6\mathrm{.}12\mathrm{.}21$: Assigning tasks to processors.

As set of $30$ tasks are assigned to a set of $10$ processors. The processors are all

distinct. Each task is assigned to exactly one processor. A processor can be assigned

more than one task.

$($c$)$ How many ways are there to assign the tasks if the tasks are all different and

each processor must receive the same number of tasks?