I think there is miss spelt data in conection with the first grouped frequency distribution table i.e 12 people are of ages less than 20, however,as per data there are only 11 people are of ages less than 20.

kindly make necessary amendment plzz.

thank you!!!!!

We appreciate your bringing the error to our notice. The error will be corrected and updated very soon. We shall most definitely try and ensure that such errors do not occur in the future.
We regret the inconvenience caused by this lapse on our part. Your feedback and suggestions are extremely valuable to us.

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 akansha u r cool

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