The avg. age of a group of 32 students is 20 years.If 4 more students join the group,the avg age increases by 1 year.The avg age of the new student is?  Select:
A) 22 years  B) 23 years  C) 24 years  D) 25 years  E) 29 years
Total age of 32 students=32*20= 
<gadget id="calculator">32*20</gadget>
<output>640</output>
640   If total age of 4 students=x   Then, (640+x)/(32+4) =(20+1), x=116   So average age of new students=116/4= 
<gadget id="calculator">116/4</gadget>
<output>29</output>
29 years   ANSW29 yearsR:29 years
<result>E</result>
The avg. age of a group of 32 students is 20 years.If 4 more students join the group,the avg age increases by 1 year.The avg age of the new student is?