Question 1157462
<br>
Choose 2 of the 5 odd digits: C(5,2) = 10 ways<br>
Choose 2 of the 4 even digits: C(4,2) = 6 ways<br>
Arrange the 4 chosen digits to form a 4-digit number: 4!=24 ways<br>
ANSWER: 10*6*24 = 1440<br>