Digits to be used 2, 3, 5, 7, 9 and no. repeation is allowed.
5 - digit number lies between 50,000 and 90,000 are those which started from 5 and 7.
(i) Total numbers which is started from 5 = 4! = 24
(ii) Total numbers which are started from 7 = 4! = 24
\(\therefore\) Required total numbers = 24 + 24 = 48