Answer
The frequency distribution is shown below.
Based on the distribution, each digit does not appears equally in the number?
Among these 40 digits, number $3$ appeared 7 times, while number $0$ appeared only 1 time.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.