b. How many combinations are there of 2 objects? of 3 objects?
c. What is a permutation? a combination?
d. Is the # of permutations of "n" objects taken "r" at a time greater than the # of combinations of "n" objects taken "r" at a time?
All answers appreciated. If you could provide information as to how you got the answer, that would be great, and it will increase your chances at getting the 10 points. Thank you everyone! a1) 2*1 = 2
a2) 3*2*1 = 6
b1) 2*1 / (2*1) = 2/2 = 1
b2) 3*2*1 / (2*1) = 6/2 = 3
c) A permutation is the number of ways to arrange n objects taken r at a time, and order matters.
A combination is the number of ways to arrange n objects taken r at a time, and order does not matter.
d) Based on the information above, you should be able to answer this one. http://regentsprep.org/regents/Math/math...
http://regentsprep.org/REgents/math/math...