At the end of the month, a certain ocean desalination plant’s reservoir contained 6 million gallons of water. This amount is twice the normal level. If this amount represents 60% of the reservoir’s total capacity, how many million gallons short of total capacity is the normal level?	Choose the correct answer
A) 15	B) 10	C) 5	D) 20	E) 25
the Q talks of total capacity, normal level, present level, shortage etc..   so it is all about not going wrong in these terms   6 MG= 60% of Total..   total = 6/.6= 
<gadget id="calculator">6/.6</gadget>
<output>10</output>
10MG..   Normal level= 1/2 of 10=5MG..   shortage of normal level=10-5= 
<gadget id="calculator">10-5</gadget>
<output>5</output>
5MG..   5
<result>C</result>
At the end of the month, a certain ocean desalination plant’s reservoir contained 6 million gallons of water. This amount is twice the normal level. If this amount represents 60% of the reservoir’s total capacity, how many million gallons short of total capacity is the normal level?