Get Answers to all your Questions

header-bg qa

The average age of 30 students is 9 years. If the age of their teacher is included, it becomes 10 years. The age of the teacher (in years) is:

  • Option 1)

    30

  • Option 2)

      31                            

  • Option 3)

    35              

  • Option 4)

    40

  • Option 5)

    27                             

Answers (1)

best_answer

Sum\: of \: ages = 30*9=270
when\: teacher\: is \: included\: then \: Sum= 31*10=310
Age\: o\! f \: teacher = 310-270= 40yrs

Posted by

rishi.raj

View full answer