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Q.

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In which class interval number of ducks is equal to 20 ponds?

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a

019  and 8099  

b

1939  and 8099  

c

2039  and 8099  

d

4059  and 100119    

answer is C.

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Detailed Solution

It is given a histogram,
Question ImageFrom the histogram, the class width of number of ducks
019=30   number of ponds.
2039=20  number of ponds.
4059=25  number of ponds.
6079=10  number of ponds.
8099=20  number of ponds.
100119=15  number of ponds.
Therefore, 2039   and 8099   is the two class interval equal to 20   ponds.
Hence, option 3 is correct.
 
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