The avg. age ofa group of 12 students is 20yers.If 4 more students join the group,the avg age increases by 1 year.The avg age of the new student is? Select the correct option:
A) 22 years  B) 23 years  C) 24 years  D) 25 years  E) 26 years
Total age of 12 students=12*20= 
<gadget id="calculator">12*20</gadget>
<output>240</output>
240   If total age of 4 students=x   Then, (240+x)/(12+4) =(20+1), x=96   So average age of new students=96/4= 
<gadget id="calculator">96/4</gadget>
<output>24</output>
24 years   ANSWER:24 years
<result>C</result>
The avg. age ofa group of 12 students is 20yers.If 4 more students join the group,the avg age increases by 1 year.The avg age of the new student is?