Question 994955
How many choices are there for the first speed dial? 17.

Assuming Granny is smart enough to not assign a speed dial to anyone already assigned a speed dial, that leaves 16 choices for the second speed dial.

Which then laves 15 for the third speed dial.

And 14 for the 4th speed dial slot.

{{{TotalDifferentSpeedDial = 17 * 16 * 15 *14}}}

You do the arithmetic!