The average of board of 7 trustees is the same as it was 5 years ago, a younger trustee having been substituted for one of them. How much younger was he than the trustee whose place he took .
31, 31, 35, 37

Question

anonymous · Answer

35

anonymous · Answer

explain dude

anonymous · Answer

I will explain tomorrow, i am running out of time. but i hope anyone else will explain it.. bye

anonymous · Answer

hehhe ok bye i got the answer thnks a lot man

anonymous · Answer

What does the average of board of 7 trustees mean ?

anonymous · Answer

means average age of 7 trustees(people) is the same as it was 5 year ago