Solve the following:
The teacher tells the class that the highest marks obtained by a student in her class is twice the lowest marks plus 7. The highest score is 87. What is the lowest score?

Set up an equation in the following cases: The teacher tells the class that the highest marks obtained by a student in her class is twice the lowest marks plus 7. The highest score is 87. (Take the lowest score to be l.)

Following data gives total marks (out of 600) obtained by six students of a particular class. Represent the data on a bar graph.

The width of each of five continuous classes in a frequency distibution is 5 and the lower class limit of the lowest class is 10. the upper class limit of the highest class is

The adjoining pie chart gives the marks scored in an examination by a student in Hindi, English, Mathematics, Social Science and Science. If the total marks obtained by the students were 540, answer the following questions. In which subject did the student score 105 marks? (Hint: for 540 marks, the central angle = 360^@ So, for 105 marks, what is the central angle?)

The marks obtained of a class of 80 students are given below Construct a histogram to represent the data above.

The following data gives the marks out of 50, obtained by 25 students of a class in a test 32,23,22,18,42,18,20,17,12,9,11 Arrange them in ascending order

Study the following Frequency distribution table and answer the question given below. Frequency Distrubution of Daily Income of 550 workers of a factory " " Table (i) What is the size of the class intervals? (ii) Which class has the highest frequency? (iii) Which class the lowest frequency? (iv) Which two classes have the same frequency?

Following data gives total marks (out of 600) obtained by six children of a particular class. Represent the data on a bar graph.