On the first test of the semester, Barbara scored a 60. On the first test of the semester, Barbara scored a 75. By what percent did Barbara's score improve?

An exam score increased from 1250 to 1600. By what percent did the score increse?

The table below shows the students of a class sorted according to their scores in a test If the students are arranged in the increasing order of their scores, the score of the student at what position is taken as the median? .

A student's mean score on 5 tests was 84. The student's mean score on the first 4 of these tests was 87. What was the student's score on the fifth of these tests ?

A group of students takes a test and the average score is 72. One more student takes the test and receives a score of 88 increasing the average score of the group to 76. How many students were in the initial group ?

Surabhi scored an 88 on her last test.Her scores before the last test were 95,89,90 and 93. What score must Surabhi make on the next test in order to receive a mean score of 90?

Raj scored twice as much as Rajesh in a test match.Together,their score was 11 more than a century.How much did each score?