Permutation and combination homework

[jinx007]

Find how many 3 digits odd number that can be obtained from the digit 1,2,3,4,5,6,7 if,

1/ Repetition of digits not allowed
2/ Repetition of digits allowed

my work

1/ --- the last i digit i have control 1,3,5,7

so 2 remaining digits = 6 P 2 x 4 (4ways)

= 120

2/ i AM STUCK

In fact, i don't really know whether the method is correct,i am a bit confuse, HELPPPP

ANSWER ACCORDING TO BOOKLET :
1/ 120

2/ 196

 

[LCKurtz]

For the second question, how many choices for the rightmost digit do you have?
After that, how many choices for the middle digit? And the first? So...

 

[Conlan2218]

nvm i gave away too much for a homework question