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The average age of 12 students is 20 years. If the age of one more student is included the average decreases by 1, what is the age of the new student?
গণিত Age Problems 07 Oct, 2020
প্রশ্ন The average age of 12 students is 20 years. If the age of one more student is included the average decreases by 1, what is the age of the new student?
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