Question

How many ordered sequences are possible that contain 2 objects chosen from 5?
a. 20
b. 6
c. 10
d. 60
e. 2

Answer 1

how do you find that its 20?

Answer 2

logcially is one method, and mathically is another ...

Answer 3

how many ways can you pick the first object?

Answer 4

5?

Answer 5

yeah, you have 5 choices ... each of those choices has how many options left to pick from?

Answer 6

oh… wow i over thought this one..

Answer 7

i think… maybe not

Answer 8

4 the next?

Answer 9

yeah, there are 4 options left ..

5 options, with 4 options each is a total of how many options? assuming of course that the order you pick them matters

Answer 10

and since ordered sequences ... a,b is different from b,a so thats fine

Answer 11

so basically 5 * 4?

Answer 12

yep

Answer 13

sweet thank you!

Answer 14

youre welcome