Question

a relay race has a team of 4 runners who run differnet parts of the race. there are 20 students on your track squad. in how many ways can the coach select students to compete on the relay team?

Answer 1

if youre going to type down an answer....then yeah

Answer 2

This looks like a straight forward permutation.20P4 ways i.e 160000 ways

Answer 3

sorry it is 116280

Answer 4

if its permutation it would be 116280 but if its combination it would be 4845
im not sure whether its permutation or combo

Answer 5

it is a permutation since order does matter

Answer 6

I calculated wrongly.20P4 = 116280 ways

Answer 7

oh
is it because it says "diff. parts of the race"

Answer 8

Let us take one person .This same person can run in any part of the race (i.e first,second, third or fourth).So every order is important

Answer 9

right, thanks!!!!!!!!!!!!!!

Answer 10

by the way, I posted the answer to your other question on permutations i.e the one about selecting the editor in chief

Answer 11

It is merely 20 * 19 * 18 * 17 = 116280

Answer 12

thanks damdam

Answer 13

thanks blexting