Question 964244
There are {{{11}}} choices for the first chore to be done.
For each one of those choices, you have {{{11-1=10}}} ways to choose your second chore.
That means there are {{{11*10=110}}} ways to choose your first and second chores.
After each of those {{{110}}} possible choices, there are {{{11-2=9}}} chores left,
so there are {{{9}}} ways to choose your third chore.
That gives you {{{11*10*9=990}}} ways to choose how to complete 3 chores.
Then, after the first 3 chores are chosen, there are {{{11-3=8}}} chores left,
so in each case there will be {{{8}}} choices for the fourth and last chore.
All in all there are
{{{11*10*9*8=highlight(7920)}}} ways to complete 4 of the 11 chores.