The average age of five persons is 40 years while the average age of some other 10 persons is 25 years. The average age of all the 15 persons is:  Pick one
A) 27 Years B) 32 Years C) 37 Years D) 30 Years E) 35 Years
x/5==40   x==200   after 10 person   x/10==25   x==250   so avg btwn 15 person is,,   (250+200) / 15==30 ans   ANSWER:30 Years
<result>D</result>
The average age of five persons is 40 years while the average age of some other 10 persons is 25 years. The average age of all the 15 persons is: