Number of students who likes candies = 80 Number of students who likes cookies = 99 Number of students who likes juice = 102 Number of students who likes both candies and cookies = 27 Number of students who likes both juice and candies = 19 Number of students who likes both juice and cookies = 28 Number of students who likes all the three = 21 Number of students who likes only cookies = 99 - 21 – 27 – 28 = 23 Hence, 23 is the correct answer.