The arithmetic mean of five given numbers is 85. Their sum is _______________

To find out the concentration of   in air, the data given below was collected for 30 localities in a certain city .Identify the class which contains assumed mean. 

Concentration of   in (ppm)	Frequency
0.00 - 0.05	4
0.05 - 0.10	9
0.10 - .0.15	9
0.15 - 0.25	2
0.20 - 0.25	6

Supposing that there were 40 students in science in the year 2009 . How much total of marks did they receive combined together ?

____________________ means to arrange the numerical data so that it can be analysed for the purpose of arriving at an informed conclusion.

The mean of first ten whole numbers is _____________

Which of following statements are true for secondary data

1. Data is not originally collected rather obtained from published or unpublished sources.

2. Secondary data are collected by an individual or an institution for some purpose and are used by someone else in another context.

3. The secondary data should be used with great care.

In the method to calculate mean using assumed mean method, What is the number of students in the class containing the assumed mean for the following data  is_______________ .

While computing the mean of grouped data, we assume that the frequencies are ________________________.

Mean of a set of observations is the value which ____________________

The number of students playing football from school C is x percents of the total number of students playing football from all the schools x equals _______________