In a class there are 100 students and their averagr age is 15 years .five students have left the class and their ages are 17 years 15 years 16 years . 15 years and 14 years average age
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total age of 100 students= 1500
age of 5 stu. left class = 77
age of 95 student. remaining=1423
average age = 1423÷95=14.9789
=14.98
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