How many positive even integers less than 100 contain digits 5 or 9?	Choose the correct choice from the following:
A) 16
B) 10
C) 18
D) 19
E) 20
Two digit numbers:   5 at tens place: 50,52,54,56,58   9 at tens place: 90,92,94,96,98   If 5 and 9 is at units place, the number cant be even   Total:5+5= 
<gadget id="calculator">5+5</gadget>
<output>10</output>
10   Answer 10
<result>B</result>
How many positive even integers less than 100 contain digits 5 or 9?