the average age of 40 boys is 16.95 years. By the addition of a new boy,the average of the class is raised to 17 years. what is the age of the new boy?
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19
Answer:
19
Step-by-step explanation:
The average age of 40 boys is 16.95
The sum of ages of 40 boys = 40*16.95 = 678
By adding a new boy, the average increased to 17 years.
The sum of ages of 41 boys = 41*17= 697
Age of new boy = 697-678=19
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