A survey was conducted by a groupofstudentsas a part of their enviromentawareness programme, in which they collected the following data regarding the number of plants in 20 houses in a locality. Find the mean number of plants per house.
Which method did you use for finding the mean, and why?

A survey conducted on 20 households in a locality by a group of students resulted in the following frequency table for the number of family members in a household : Find the mode of this data.

Following table shows the points of each player scored in four games: Now answer the following questions: To find the mean number of points per game for C, would you divide the total points by 3 or by 4? Why?

Find the L.C.M. of the following numbers in which one number is the factor of the other : 5,20 What do you observe in the results obtained.

Total number of students of a school in different years is shown in the following table: Prepare another pictograph of students using any other symbol each representing 50 students.Which pictograph do you find more informative? .

Form the pair of linear equations in the following problems and find their solutions (if they exist) by any algebraic method :- The total expenditure per month of a household consists of a fixed rent of the house and mess charges depending upon the number of people sharing the house. The total monthly expenditure is ? 3900 for 2 people and 7500 for 5 people. Find the rent of the house and mess charges per head per month.

The following is the record of goals scored by team A in a football session. For the team B, mean number of goals scored per match was 2 with a standard deviation 1.25 goals. Find which team may be considered more consistent ?

A survey was made to find the type of music that a certain group of young people liked in a city. Adjoining pie chart shows the findings of this survey. Find this pie chart answer the following (i) If 20 people liked classical music, how many young people were surveyed? (ii) Which type of music is liked by the maximum number of people? (iii) If a cassette company were to make 1000 CD's how many of each type would they make?