A pharmacist has two solutions of alcohol, a 15% solution and a 28% solution. How many milliliters of each solution should be mixed to gather to make a 100ml solution which is 20% alcohol?
Option
(a) 60, 40
(b) 30, 70
(c) 55, 45
(d) 61.5, 38.5

• (d) 61.5, 38.5
  
  From allegation and mixture, ratio of the 2 solutions mixed = (28-20):(20-15)
  =8:5
  
  milliliters of 1st solution = 8/13 *100 = 61.5ml
  milliliters of 2nd solution = 5/13 *100 = 38.5ml
  
• 10 years agoHelpfull: Yes(4) No(0)
• d)61.5,38.5
• 10 years agoHelpfull: Yes(1) No(0)