I think it's 49 but need an explanation :) Giving medal aswell.
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 out of detective, adventure, and 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.
Stacey Warren - Expert brainly.com
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