average of 12 students are 15yrs then 1 new student joined then average become 16 yrs found the age of new student
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28 years
Step-by-step explanation:
total age of 12 students = 15 × 12 = 180
total age of 13 students= 16× 13 = 208
=》 208 - 180
=》 28 years is the age of new student
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