Answer:
36
Explanation:
Given that
is given
First term is 15
This is an arithmetic series with a =15 and d =3
If n is the number of terms, then we have
Sum of n terms = 36 xn = 36n
But as per arithmetic progression rule
![S_n = (n)/(2) [2a+(n-1)d]\\= (n)/(2) [30+(n-1)3]=36n](https://img.qammunity.org/2021/formulas/mathematics/high-school/6mi5atwwt26hy56qn4njaqnbuzv4y7qzko.png)

When there are n terms we have middle term is the 8th term
Hence median is 8th term
=
