The performance of a student in `1^(st)` term and `2^(nd)` term is given. Draw a double bar graph choosing appropriate scale and answer the following:
In which sub ject, has the child improved his performance the most?

The performance of a student in 1^(st) term and 2^(nd) term is given. Draw a double bar graph choosing appropriate scale and answer the following: Has the performance gone down in any subject?

Number of persons in various age groups in a town is given in the following table. Draw a bar Draw a bar graph to represent the above information and answer the following questins. (take 1 unit lenght = 20 thousands) (a) Which two age groups have same population?

A survey of 120 school students was done to find which activity they prefer to do in their free time. Draw a bar graph to illustrate the above data taking scale of 1 unit length = 5 students. Which activity is preferred by most of the students other than playing?

Analyse the observation table which shows variation of image distance [v] with object distance [u] in the case of a convex lens. Answer the questions that follow without doing any calculations. {:("Sl.No","Object distance","Image distance"),(,"u [cm]","v [cm]"),(1,-90,+18),(2,-60,+20),(3,-30,+30),(4,-20,+60),(5,-18,+90),(6,-10,+100):} (a) What is the focal length of the convex lens ? Given reasons to support your answer. (b) Write the Sl.No of the observation which is not correct. How did you arrive at this conciusion ? (c ) Use an appropriate scale to draw the ray diagram for the observation at Sl. No 4 and find the approximate value of magnification.