How many positive even integers less than 100 contain digits 3 or 7? Choose the correct choice from the following:
A) 16 B) 17 C) 18 D) 10 E) 20
Two digit numbers:   3 at tens place: 30,32,34,36,38   7 at tens place: 70,72,74,76,78   If 3 and 7 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>D</result>
How many positive even integers less than 100 contain digits 3 or 7?