Page 129 - Maths Class 06

To solve his problem, one of his workers Vinay helps him and rearranges the data in the following form:
Table-2

168 168 168 168 168 171 171
171 171 171 171 172 172 172

172 172 172 174 174 174 174

174 174 174 174 175 175 175
175 175 175 181 181 181 181

From this form of data the manager was able to find out the answers of his first question, but the question
related to the number of dresses for each size was still not found out.

To solve this problem, his another worker Kamal offers his help. He further rearranges the data in tabular
form. He draws two columns, one for height (in cm) and another for number of workers. (See table-3)

Table-3

Heights (in cm) Number of workers

168 5

171 6
172 6

174 8
175 6

181 4

Now the manager was happy as now he could answer all the questions related to data.

After looking at the data, the manager thought that when the data of 35 workers was so difficult to
arrange, then what would happen if the number of person increases to 500? To solve this, he adopt
another method. He draws three tables, one each for data of height, tally and number of workers. From
table-3 he draws the measurements one by one and put a tally mark ( | ) for it. After drawing four tally
marks he draws the fifth one by crossing all the four marks (||||). Thus, he further rearranges the data as
given below.

Table-4
Height (in cm) Tally Marks Number of Workers (Frequency)

168 |||| 5
171 |||| | 6

172 |||| | 6

174 |||| ||| 8
175 |||| | 6

181 |||| 4

129 Mathematics-6