MCQ PracticeThe average marks of a class of 30 students is 40 and that of another class of 50 students is 60. Find the average marks of all the students?Subject: MathematicsTopic: Basic MathsA50B47.5C59D52.5Correct Answer: DPractice QuizBack to MCQsRelated MCQsI expect you from school by this time next year and for a job.Fill in the blank with the most appropriate word. She asked him where __________Fill in the blank with a suitable option: Nancy ___________to play tennis tomorr