In a survey of 25 students, it was found that 15 had taken Mathematics, 12 had taken Physics
Channel: Doubtnut
Date: 28/01/2020

In a survey of 25 students, it was found that 15 had taken Mathematics, 12 had taken Physics and 11 had taken Chemistry, 5 had taken Mathematics and Chemistry, 9 had taken Mathematics and Physics, 4 had taken Physics and Chemistry and 3 had taken all the three subjects. The number of students who had taken only physics is :