Question 296128
Let O=event of selecting an odd digit and E=event of selecting an even digit

The probability that the first four digits of Jessica’s ID number will all be odd numbers is P(OOOOE)

If they are independent events then this equals to 
P(O)*P(O)*P(O)*P(O)*P(E) = 4/5*(3/4)*2/3*1/2*1/1 = 1/5