Question

Determine whether each statement is true or false. Explain.

The number of permutations of two items from a data set is always two times the number of combinations when taking two objects at a time from the same data set.

Answer 1

nP2 = 2(nC2) ?

Answer 2

\[nP2 = \frac{n!}{(n-2)!}\]
\[nC2 = \frac{n!}{(n-2)!*2!}\]

Answer 3

it was False

Answer 4

right?

Answer 5

I'll let you figure it out. Check some test cases if you need to.