The sum of n terms of two A.P’s are in the ratio of (n + 7): (3n + 11). The ratio of their 9 terms is Question The sum of n terms of two A.P’s are in the ratio of (n + 7): (3n + 11). The ratio of their 9 termsis in progress 0 Math Samantha 3 weeks 2021-10-07T11:29:50+00:00 2021-10-07T11:29:50+00:00 1 Answer 0 views 0

## Answers ( )

Answer:8:19

Step-by-step explanation:Let

AP1 = a1,a2……

AP2=b1,b2…….

Sa =

n+7Sb 3n+11 (given)

Substituting 9 in place of n,

=

9+73*9 + 11

=

1627 + 11

=

1638

Brininging ratio into simplest form,

16=838 19