# NCERT Class 8 Mathematics Solutions: Chapter 5 –Data Handling Exercise 5.1 Part 1

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**Question: 1 **For which of these would you use a histogram to show the data:

(a) The number of letters for different areas in a postman’s bag.

(b) The height of competitors in an athletics meet.

(c) The number cassettes produced by 5 companies.

(d) The number of passengers boarding trains from 7.00 a.m. to 7.00 p.m. at a station.

Give reason for each.

**Answer:**

Histogram is a graphical representation of data, if data represented in manner of class-interval.

Therefore, for case (a) and (c), we would use a histogram to show the data because in these cases, data can be divided into class-intervals.

In case (b), a group of competitions having different heights in athletics meet.

In case (d), the number of passengers boarding trains in an interval of one hour at a station.

**Question: 2 **The shoppers who come to a departmental store are marked as: man (M), woman (W), boy (B) or girl (G). The following list gives the shoppers who came during the first hour in the morning.

Make a frequency distribution table using tally marks. Draw a bar graph to illustrate it.

**Answer:**

The bar-graph of illustration data are as follows:

**Question: 3 **The weekly wages of 30 workers in a factory are:

Using tally marks, make a frequency table with intervals as and so on.

**Answer:**

The representation of data by frequency distribution table using tally marks is as follows