The average age of a class of 39 students is 15 years. If the age of the teacher be included, then the average increased by 3months. Find the age of the teacher?
Choose the correct answer: A) 25 B) 28 C) 30 D) 35 E) 39
Total age of 39 persons = 39*15= 
<gadget id="calculator">39*15</gadget>
<output>585</output>
585 years   25verage age of 40 persons= 15yrs 3months = 61/4 years   Total age of 40 persons = 61/4 * 40= 
<gadget id="calculator">61/4 * 40</gadget>
<output>610</output>
610 years   25ge of the teacher= 610-585= 
<gadget id="calculator">610-585</gadget>
<output>25</output>
25 years   25nswer is 25
<result>A</result>
The average age of a class of 39 students is 15 years. If the age of the teacher be included, then the average increased by 3months. Find the age of the teacher?