Answer:
6840
Step-by-step explanation:
multiply combinations
n!/(r!(n − r)!)
n choose r
n (objects) = |n
r (sample) = r
(4 teachers, CHOOSE 2)*(20 students, CHOOSE 3)
C(4,2) times C(20,3) =
C(n,r)=?
C(n,r) = C(4,2)
4! / (2!(4-2)!)
4! /2! x 2!
= 6
C(n,r)=?
C(n,r) = C(20,3)
20! / (3!(20-3)!)
20! / 3! x 17!
= 1140
6 * 1140 = 6840
alegbracom Edwin McCravy
Answer:
c is the answer
Step-by-step explanation:
when you put the negative into the second equation it makes it match up with the algebra tiles answer
GIVE ME BRAINILEST
5×21/-1+9
105/-1 +9
-105 +9
-96
hope that helps
=2x5
=10
If you have a certain type of calculator it could answer that question easy