The enrolment in a school during six consecutive years was as follows:
1555, 1670, 1750, 2013, 2540, 2820
Find the mean enrolment of the school for this period.

The following are the number of books issued in a school library during a week: 105, 216, 322,167,273,405 and 346. find the average number of books issued per day.

The following table gives the enrollment in higher secondary school in 1978. Find the mean enrolment per H.S. School.

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? .

The following table gives the number of students in IX class in a school during the academic years 2012-2013 to 2016-17 Represent the above data by a bar graph.

The following distribution gives the state-wise teacher-student ratio in higher secondary schools of India. Find the mode and mean of this data.Interpret, the two measures.

Let X denote the number of hours you study during a randomly selected school day. The probability that X can take the values x, has the following form, where k is some unknown constant.: P(X=x)={(0.1,,if,,x=0),(kx,,if,,x=1or2),(k(5-x),,if,,x3or4),(0,,,,otherwise):} Find the value of k.