Correct Answer - Option 3 : 7
Given:
Total number of students in class = 39
Number of students have dog = 20
Number of students have cat = 26
Calculation:
Students have bot cat and dog = (numbers of students have dog + numbers of students have cat) - Total number of students
⇒Students have bot cat and dog = 20 + 26 - 39
⇒ 46 - 39 = 7
∴ Students have both cat and dog are 7.