The average age of 80 boys in a class is 15. the average age of a group of 15 boys in the class is 16 and the average age of another of another 25 boys in the class is 14. what is the average age of the remaining boys in the class
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The average age of the remaining boys is 35
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avg. age of 80 = 15
avg. age of 15 boys = 16
avg. age of 25 boys = 14
avg. age of remaining 40 boys = x
now,
=> (16 + 14 + x)/3 = 15
=> 30 + x = 45
=> x = 15
So, the avg age of remaining 45 boys is 15
avg. age of 15 boys = 16
avg. age of 25 boys = 14
avg. age of remaining 40 boys = x
now,
=> (16 + 14 + x)/3 = 15
=> 30 + x = 45
=> x = 15
So, the avg age of remaining 45 boys is 15
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