Welcome to Westonci.ca, your go-to destination for finding answers to all your questions. Join our expert community today! Join our Q&A platform and connect with professionals ready to provide precise answers to your questions in various areas. Explore comprehensive solutions to your questions from knowledgeable professionals across various fields on our platform.

6) In a school, out of 400 students, 300
students opt for at least one subject out of
Biology, Chemistry and Mathematics. If 120
students opted for Biology, 150 students
opted for Chemistry, 200 students opted for
Mathematics and 30 opted for all the three
subjects, find the number of students who
opted for exactly two subjects.