Amanda has scored 84, 94, 88, and 58 on her previous four tests. What score does she need on her next test so that her average (mean) is 83?

Linda has taken four Mathematics tests so far this year. Each test has been out of 20 marks, and her average mark has been 15. What mark Linda has to score in the 5th test in order to bring her average score to 16?

After six biology tests, Ruben has a mean score of 75. What score does Ruben need on the next test to raise his average (mean) to 77?

Sam will take four science tests this quarter. Her scores on three of the tests are shown below.What does Sam need to score on the fourth test to ensure that she will have an average of 90% for all four tests?

Julie’s scores in Biology quizzes are as follows: 92, 87, 67, 99, and 80. What is the mean of these scores?*1 pointa. 81.83b. b. 82.83c. c. 83.17d. d. 84.17

A student took 5 model exams and scored 85, 88, 90 and 92 in four subjects namely English, Geography, Economics and History exams respectively. She did not know her score in mathematics exam but she knew that her mean score in all five exams is 90. What is her score in mathematics?