[FONT=q_serif]How many 5 digit odd numbers can be formed from 0 , 2 , 3 , 6 and 9 without repetition of digits?[/FONT]
Is the ans 36 or 72?
My working:
Last digit : 2 choices [odd number]
First digit : 3 choices [cannot be 0 or last digit]
Second digit : 3 choices [5-2]
Third digit : 2 choices [5-3]
Fourth digit : 1 choice [5-4]
TOTAL : 2 x 3 x 3 x 2 x 1 =36
Is the ans 36 or 72?
My working:
Last digit : 2 choices [odd number]
First digit : 3 choices [cannot be 0 or last digit]
Second digit : 3 choices [5-2]
Third digit : 2 choices [5-3]
Fourth digit : 1 choice [5-4]
TOTAL : 2 x 3 x 3 x 2 x 1 =36