Question

There were 100 visitors in a library on a particular day of them 28 had taken only Mathematics book. 30 had taken Physics book. 42 had taken Chemistry book. 8 had taken Mathematics and Physics 5 had taken Chemistry and Mathematics 8 had taken Physics and Chemistry 3 had taken all three subject. Find the number of students taken only two book

Answer 1

Answer:

According to your question::

There are visiters in library:

28 : mathematics

30: Physics

42 : Chemistry

8 : Mathematics and Physics

5: Chemistry and Mathematics

8: Physics and Chemistry

3: all subjects

so, there are 21 students who have taken only two books

Step-by-step explanation:

this is your final answer 21