The average age 15 girls of a class is 15 years. Out of these, the average age of 12 girls is 13 years and that of the other 3 girls is 14 years. The age of the 15th girl is?
Choose the correct choice from the following options
A) 35  B) 30  C) 31  D) 28  E) 27
Age of the 15th girl = 15*15 - (12*13+3*14) = 225-198= 
<gadget id="calculator">225-198</gadget>
<output>27</output>
27 years   Answer is 27
<result>E</result>
The average age 15 girls of a class is 15 years. Out of these, the average age of 12 girls is 13 years and that of the other 3 girls is 14 years. The age of the 15th girl is?