The weights of tea in 70 packets are shown in the following table : 

Weight (in gram) Number of packets
200-201
201-202
202-203
203-204
204-205
205-206
13
27
18
10
1
1

 Draw the less than type and more than type ogives for the data and use them to find the median weight.

Answers (1)

Answer.     [201.8]
Solution.

Less than type More than type  
Weight Number of packets Number of packets Number of students
Less than 200 0 More than or equal to 200 70
Less than 201 13 More than or equal to 201 70-13 = 57
Less than 202 40 More than or equal to 202 57-27 =30
Less than 203 58 More than or equal to 203 30-18 =12
Less than 204 68 More than or equal to 204 12-10 = 2
Less than 205 69 More than or equal to 205 2-1 = 1
Less than 206 70 More than or equal to 206 1-1 = 0

Here\, \, n = 70,\frac{n}{2}= \frac{70}{2}= 35                             
Hence median = 201.8

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