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Question

The graph below shows the number of people of different age groups staying in a hotel. Find the correct statement(s) among the options.

A
Total number of people in 0-20 age group is 10
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B
Total number of people in 0-20 age group is 5
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C
Maximum number of people are from age group of 21-30 years
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D
Total number of people staying in the hotel is 35
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Solution

The correct options are
A Total number of people in 0-20 age group is 10
C Maximum number of people are from age group of 21-30 years
The number of people in a class is proportional to area.
Therefore, the class of 0-20 is twice the size of other classes.
So, total frequency of 0-20 class is 5x2=10
Hence option A is correct and B is incorrect.
The class of 21-30 age group has the highest frequency.
Hence option C is correct.
On summing up all the frequencies, it can be seen that D is incorrect

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