Pat, Kate, and Mark charged a total of 117 hours to a certain project. If Pat charged twice as much time to the project as Kate and 1/3 as much time as Mark, how many more hours did Mark charge to the project than Kate?
Answers: A) 18 B) 36 C) 72 D) 90 E) 65
65   all u do is do   2:1:6=&gt;2x+x+6x=117=&gt;x= 13   26:13:78   78-13= 
<gadget id="calculator">78-13</gadget>
<output>65</output>
65   Answer 65
<result>E</result>
Pat, Kate, and Mark charged a total of 117 hours to a certain project. If Pat charged twice as much time to the project as Kate and 1/3 as much time as Mark, how many more hours did Mark charge to the project than Kate?