Respuesta :
Answer:
This was already answered! <3
Step-by-step explanation:
https://brainly.com/question/12640699
Answer: 49
Step-by-step explanation:
We know there are 100 students in total.
50 are in each group.
23/50 in age group 7-12 like adventure or biography.
And 28 in total like detective.
100 - (28+23) is your answer