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Q.

The width of each of five continuous classes in a frequency distribution is 5 and the lower class-limit of the lowest class is 10. The lower class-limit of the highest class is

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a

35

b

15

c

40

d

30

answer is B.

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Detailed Solution

detailed_solution_thumbnail

Given

The width of the continuous classes is 5

The frequency table is starting from 10

The total interval in a frequency distribution table is 5

Therefore the frequency distribution is 

Frequency distribution
10-15
15-20
20-25
25-30
30-35

According to the above data 

The highest class is 30-35 and the lower class-limit of the highest class is 30.

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