Question

How many different groups of 3 movies can a person rent if there are 12 movies to choose from?

Answer 1

multiply the # of movies time # 0f groups 12X3

Answer 2

That's not the right answer

Answer 3

12 in total or in each group?

Answer 4

12 total

Answer 5

Ok I am a visual person so I have movies a,b,c,d,e,f,g,h,i,j,k,l;
If I start grouping them in 3's you would have
ABC, ACD, ADE,AEF,AFG,AGH,AHI,AIJ,AJK,AKL (10 GROUPS)
BCD, BDE, BEF,BFG,BGH,BHI,BIJ,BJK,BKL (9 GROUPS)
CDE,CEF,CFG,CGH,CHI,CIJ,CJK,CKL (8 GROUPS) AND SOOOOO ON.... MEANING
A=10
B=9
C=8
D=7
E=6
F=5
G=4
H=3
I=2
J=1
ADD TOGETHER-
10+9+8+7+6+5+4+3+2+1= 55 groups so you were correct 36 was incorrect

Answer 6

The answer should be one of this
A 6
B 180
C 220
D 1,320

Answer 7

hmmm - http://www.lemars.k12.ia.us/webfiles/mboyd/Pre-Algebra%20Textbook%20%28e-edition%29/Source/J9D11GAD.pdf maybe this will help because now I am confused........oh here- it is 220--- http://www.mathsisfun.com/combinatorics/combinations-permutations-calculator.html