If the average marks of three batches of 30, 50, and 70 students respectively are 70, 40, and 60, what is the average mark of all the students? - MrProfessor

Practice this MCQ: If the average marks of three batches of 30, 50, and 70 students respectively are 70, 40, and 60, what is the average mark of all the students?. Test your knowledge and see the detailed explanation on MrProfessor.