What is the property the statement illustrates7•m=m•7?
2 answers:
You might be interested in
Answer:
d. 20
Step-by-step explanation:
The given question implies 5 permutation 2, i.e .
But,
=
So that for , n = 5 and r = 2.
=
=
=
Cancel out 3 and 2 with respect to the numerator and denominator.
= 5 * 4
= 20
Therefore,
= 20
So that the correct option is D.