Aptitude - In a class the average age is 16yrs.if the teacher who is 40 yrs of age is also included ,the averag

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In a class the average age is 16yrs.if the teacher who is 40 yrs of age is also included ,the

average becomes 17yrs,how many students were there?

Total Answers and Comments: 3

Last Update: February 12, 2006

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Submitted by: nmodi

Ans. 23
Let x be the number of student in the class.
16*x + 40 = 17(x+1)
x = 40 - 17 = 23.

Above answer was rated as good by the following members:
jasu85

July 07, 2005 03:18:44

deepa

RE: In a class the average age is 16yrs.if the teacher who is 40 yrs of age is also included ,the averag...

27 is the answer

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July 17, 2005 13:30:29

nmodi

RE: In a class the average age is 16yrs.if the teacher who is 40 yrs of age is also included ,the averag...

Ans. 23
Let x be the number of student in the class.
16*x + 40 17(x+1)
x 40 - 17 23.

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1 0

Overall Rating: +1

February 11, 2006 23:45:34

Pradeep Singh MCA , 6th Sem , CUSAT

RE: In a class the average age is 16yrs.if the ...

let the total no of students is x ;then the sum of ages of 16 stuidents will be 16*x ; when the teachers age is included then the total ages will be (16*x + 40)So now the average age of (x+1) 17 )given in the question) ( 16*x + 40 ) / (x+1)On solving this equeation we will get x 23 So the total no of students in th class is 23 .

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