To evaluate the combination we proceed as follows:
21C3
Given nCk we shall have:
n!/[(n-k)!k!]
thus plugging the values in the expression we get:
21!/[(21-3)!3!]
=21!/(18!×3!)
=1330
Answer: 1330
Answer:
It would be a rational number.
Step-by-step explanation:
An easy way to tell if a number is rational is by seeing if it can be put in fraction form. As you can see, 27/100 is a fraction, so it is rational.
Answer:
40 or 45%
Step-by-step explanation:

Let's see A

Let's see B

Let's see C

Let's see D

E. 2x + 24
So the answers are A, C, D and E.
Hope this helps.