Question

Twenty people report for jury duty. How many different 12 perosn juries can be chosen

Answer 1

125,970

Explanation:

Even if jury are assigned numbers, the order in which they are picked has no importance. That means that it's a combination, not a permutation.

The formula to calculate possible combinations is:

`C(n,r) = (n!)/((r! (n-r)!))`

Where n is the global population, and r is the number of selected items.

In our case, n = 20 and r = 12, so...

`C(20,12) = (20!)/((12! (20-12)!)) = 125970`

There are 125970 different ways to select 12 jury members out of 20 people.