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  • The average age of 24 boys and the teacher is 15 years. When the teacher’s age is excluded, the average decreases by 1. What is the age of the teacher

 

The average age of 24 boys and the teacher is 15 years. When the teacher’s age is excluded, the average decreases by 1. What is the age of the teacher?

 

  • Option 1)

     

    38 years

     

  • Option 2)

     

    39\: years

     

  • Option 3)

     

    30 \:years

     

  • Option 4)

     

    Data inadequate

     

  • Option 5)

     

    40\: years

     

Answers (1)

best_answer

Below you can find the age of the teacher:

Avg. \: Of (24 boys\: & \: 1 teacher ) =>25\: observations = 15
sum\: of \: 25 = 25*15=375
without \: teacher\: sum = 24*14= 336
Age \: of\: teacher= 375-336=39 years

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