A survey was conducted among 100 students of age groups 7–12 years and 13–18 years to find their favorite book genre. The students had to select any one genre from detective, adventure, or biography. Out of the 50 students in the age group 7–12 years who participated in the survey, 23 liked adventure or biography. The total number of students of both age groups who liked detective books was 28. Using a two-way table, compute the total number of students in the age group 13–18 years who liked adventure or biography.

23
27
49
51