Question

30 children were asked about the number of hours they watched TV programmes last week. The results are recorded as under: Number of hours 0-5, 5-10, 10-15, 15-20; Frequency 8, 16, 4, 2. Can we say that the number of children who watched TV for 10 or more hours a week is 22? Justify your answer.

Heights (in cm) of 30 girls of Class IX are given below: 140, 140, 160, 139, 153, 153, 146, 150, 148, 150, 152, 146, 154, 150, 160, 148, 150, 148, 140, 148, 153, 138, 152, 150, 148, 138, 152, 140, 146, 148. Prepare a frequency distribution table for this data.

The blood groups of 30 students are recorded as follows: A, B, O, A, AB, O, A, O, B, A, O, B, A, AB, B, A, AB, B, A, A, O, A, AB, B, A, O, B, A, B, A. Prepare a frequency distribution table for the data.

The value of π upto 35 decimal places is given below: 3.14159265358979323846264338327950288. Make a frequency distribution of the digits 0 to 9 after the decimal point.