In a class of 180 students, how many girls scored over `70%` in the Chemistry test ?
I. Exactly 15 boys scored over `70%` in the test.
II. 2/3 rd of the class scored over `70%` in the test.

In a class of 60 students there are 20 girls who scored an average of 40 marks in the test, what is the average marks of the boys if the class average is 60 marks?

In a class of 10 boys and 15 girls, the average score on a biology test is 90. If the average score for the girls is x, what is the average score for the boys in terms of x ?

A class consists of 50 students out of which 30 are girls, the mean of mark scored by girls in a test is 45 and that of boys is 30. determine the mean score of the whole class.

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? .

The table below shows the students of a class sorted according to their scores in a test Find the median score. .

In a test consisting of 140 questions, a candidate correctly answered 70% of the first 80 questions. What percentage of the remaining questions does the candidate need to correctly answerto score 60% in the test?

In an examination out of 480 students, 85% of the girls and 70% of the boys have passed. How many boys appeared in the examination , if total pass percentage was 75% ?