Answer:
Option: C is the correct answer.
The number of students in the age group 13-18 years who liked adventure or biography are:
c. 49
Explanation:
According to the given information in the table we can make a two-way frequency table as follows:
Age group Adventure or Biography Detective Total
7-12 23 27 50
13-18 49 1 50
Total 72 28 100
- As there are total 100 students and 50 students belong to the age group 7-12 years.
Hence, the remaining 50 students belong to the age group 13-18 years.
- Also, 23 liked adventure or biography in the age-group 7-12 years.
This means that the remaining out of 50 students like detective books.
Hence, number of students in age group 7-12 years who like detective is:
50-23=27
- Also, it is given that total 28 students like detective books.
Hence, the number of students in the age group 13-18 years who like detective books is:
28-27=1.
- Also as there are total 50 students in age group 13-18 years out of which 1 student like detective books so the remaining will like adventure or biography.
Hence, the number of students who like adventure and biography in the age group 13-18 years is calculated as:
50-1=49 students.