Question

A class teacher has the following absentees record of 30 students of a class. Number of days | 0 – 4 | 4 – 8 | 8 – 12 | 12 – 16 | 16 – 20 | 20 – 24 Number of Absent students | 1 | 8 | x | 6 | 5 | y If the mean number of days a student was absent is 12, find the values of x and y.

Assertion (A) : Median marks of students in a class test is 16. It means half of the class got marks less than 16. Reason (R) : Median divides the distribution in two equal parts.

The frequency distribution given below shows the weight of 40 students of a class. Find the median weight of the students. | Weight (in kg) | Number of Students | |----------------|--------------------| | 40 – 45 | 9 | | 45 – 50 | 5 | | 50 – 55 | 8 | | 55 – 60 | 9 | | 60 – 65 | 6 | | 65 – 70 | 3 |

The following table shows the age of patients admitted in a hospital during a particular week : | Age (in years) | 5 – 15 | 15 – 25 | 25 – 35 | 35 – 45 | 45 – 55 | 55 – 65 | |----------------|--------|---------|---------|---------|---------|----------| | Number of Patients | 5 | 12 | 20 | 24 | 15 | 4 | Find the mean age of the patients.