The quantity of water needed to reduce 9 ml shaving lotion containing 50% alcohol to a lotion containing 30% alcohol is? Choose the correct option.
A) 6ml  B) 10ml  C) 5.5ml  D) 8ml  E) 9.3ml
Quantity of alcohol in 9ml lotion = 50/100 *9= 
<gadget id="calculator">50/100 *9</gadget>
<output>9/2 = around 4.5</output>
4.5ml   Let the water added be x ml   4.5 / 9+x= 30/100   x = 6ml   6mlnswer is 6ml
<result>A</result>
The quantity of water needed to reduce 9 ml shaving lotion containing 50% alcohol to a lotion containing 30% alcohol is?