Question

Find the number of
a.M.S b/w 5 and 83 if the ratio b/w the first
a.M. And the last
a.M. Is 1:7.

Answer 1

Answer:

So, a=5 and a+(n−1)d=83 . The first mean is 5+d and the last mean is 83−d and we insist that 83−d5+d=7 . Thus, 83−d=35+7d and d=6 . From that, 5+6(n−1)=83 and n=14 . However, that includes Both the first and last terms. So there are 12 means inserted.