Question

Can anyone help me figure out this problem? http://i158.photobucket.com/albums/t120/brinazarski2/q_zps987ec45b.png

Answer 1

well you have for the permutation, for the first digit 4 choices, for the second 4, the third 3 and... so you have 4.4.3.2.1 in total.
if you want 2 to be the second digit we have then
3 choices for the first element.1 for the second(it's 2).then 3 for next one and 2 for next one
so
3.1.3.2
so a/b
3.1.3.2/4.4.3.2.1=3/4^2=3/16
so 3+16=19

Answer 2

Awesome!!! Thanks :)