Susan received grades of 78, 93, 82, and 76 on four math exams. What is the lowest score she can receive on her next math exam and have an average of at least 85 on the five exams?

An online store receives customer satisfaction ratings between 0 and 100, inclusive. In the first 10 ratings the store received, the average (arithmetic mean) of the ratings was 75. What is the least value the store can receive for the 11th rating and still be able to have an average of at least 85 for the first 20 ratings?

In a class, 18 students had an average midterm exam grade of 85 and the 12 remaining students had an average midterm exam grade of 90. What is the average midterm exam grade of the entire class?

Shabana scored 736 marks out of 800 In her exams. What percentage of the marks did she score ?

Shabana scored 736 marks out of 800 In her exams. What percentage of the marks did she score ?

Study the given information carefully and answer the following questions. Four students i.e. A, B, C and D appeared for written and practical examinations of year 2019-20 The information given below is known: Total Maximum Marks = Maximum marks of written Exam + Maximum marks of practical Exam Total Maximum weighted score = Maximum marks in written exam xx weighted % + Maximum marks in practical exam xx weighted % Weighted score = Marks obtained in written exam xx weighted % + Marks obtained in practical exam xx weighted % Weighted percentage of written exam is 60% and that of practical exam is 40%. Also, maximum marks of written exam is 80 and that of practical exam is 60 It is given that: Total weighted score of A is 52 . Total weighted score of B is 52 and B obtained 55 marks in practical exam. C obtained 50 marks in practical exam. Marks obtained by D in written examination is 70 and D obtained 75% marks in practical exam. If the average marks of A, B, C and D in the practical exam is 47.5 and both A and C scored equal marks in written exam, then what is the average weighted scores of C and D?

Maria has taken four chemistry tests and have an average (arithmetic mean) score of 80. IF the scores a 90 on her fifth chemistry test, what is her average for these five tests?