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Q.

Construct the frequency distribution table from the following cumulative frequency table and state the number of students in the age group 10-13.

Ages

No. of students

Below 4

0

Below 7

85

Below 10

140

Below 13

243

Below 16

300


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a

85  

b

113  

c

103  

d

145    

answer is C.

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Detailed Solution

It is given a table,

Ages

No. of students

Below 4

0

Below 7

85

Below 10

140

Below 13

243

Below 16

300

Frequency distribution table is

Class interval

Cummulative frequency

4-7

85

7-10

55

10-13

103

13-16

56

Number of students below age 10   is 140   and the number of students below age 13   is 243  .
Therefore number of students in the age group of 10−13  is 243−140=103  .
Hence option (3) is correct.
 
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