The average age of a class of 39 students is 15 years. If the age of the teacher be included, then the average increases by 3 months .Find the age of the teacher. Pick
A) 22	B) 25	C) 8	D) 27	E) 19
Sum of the ages of the students = 39×15 = 585   New average = 15 years 3 months = 15 + 1414 year   Sum of the ages of students and teacher = 40×15141514 = 40×614614 = 610   Teacher age = 610 – 585 = 25 years.   Answer:25
<result>B</result>
The average age of a class of 39 students is 15 years. If the age of the teacher be included, then the average increases by 3 months .Find the age of the teacher.