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)
A admin

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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