A three digit numberal with no repeated digits is made from the digits 1 throguh 7. What is the probability that the number indicated is:

odd:

7*6*4

A multiple of 5:

7*6*1

Between 300 and 500

2*6*5

Between 300 and 600

4*5*5

thats what i think it is but I doubt they're right so could anyone help me please?