CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

The average age of 40 students in a group is 16 years. When teacher's age is included to it, the average increases by one. Find out the teacher's age in years.


  1. 47

  2. 50

  3. 57

  4. 49

  5. 54


Solution

The correct option is C

57


Average age of 40 students in a group is 16

Sum of the ages of 40 students =40 × 16

When teacher's age is included to it, the average increases by one

Average = 17

Sum of the ages of 40 students and the teacher =41×17

Hence teacher's age =(40 × 16) - (41 × 17) = 57

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
QuestionImage
QuestionImage
View More...



footer-image