Question

In how many ways 4 women draw water from 4 taps, if no tap remains unused ?

Answer 1

Total number of women = 4

Total number of taps = 4

If no tap remains unused.

$\therefore$ Number of ways = $4\times 3\times 2\times 1$ = 4!

Hence, 4 women draw water from 4 taps in 4! ways.