the average age of 40 students of a class is 15 years. An 18 year old student left the class and a new student was admitted. as a result the average age fell to 14.885 years. Find the age of the new student
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Answer:
13.4 yrs
Step-by-step explanation:
Let x be the new student.
original Total age of class = 15*40 = 600
Total age after after one student left and another one joined = 40*14.885 = 595.4
Decrease in total age of class = 600 - 595.4 = 4.6
Thus the age of new student = 18 - 4.6 = 13.4 yrs
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