Answer:
c.
Step-by-step explanation:
1.25x5=6.25
6.25+1.37=7.62
Answer: I think the answer is n = 1.
You would square 3968 and subtract 1.
There are 19 people total, and groups of four are being asked of us. We can use the formula for permutations or combinations.
Permutations:

Combinations:

Where in both scenarios, there are <em>n</em> objects being chosen at <em>r</em> times.
19 P 4 is 93024
19 C 4 is 3876
It all depends on whether order matters with group placement; if it does, your answer is
93024, if not, then your answer is
3876.:)