SOLUTION: Eight friends are to make a trip in 2 cars, with 4 people in each car. In how many ways can this be done?
a. 1,680
b. 100
c. 70
d. 120
Algebra ->
Permutations
-> SOLUTION: Eight friends are to make a trip in 2 cars, with 4 people in each car. In how many ways can this be done?
a. 1,680
b. 100
c. 70
d. 120
Log On
Question 1162451: Eight friends are to make a trip in 2 cars, with 4 people in each car. In how many ways can this be done?
a. 1,680
b. 100
c. 70
d. 120 Answer by ikleyn(52778) (Show Source):
From the context, the order does not matter - - - so, the problem is about COMBINATIONS.
You have a choice of 4 passengers from the group of height to one of the two cars --- after that the set of
passengers to the other car is defined uniquely (with no choice).
So the ANSWER is = = 70.
