Let a1, a2, ..., an be a given A.P. whose common difference is an integer and Sn = a1 + a2 + .... + an. If a1 = 1, an = 300 and 15 $ \le $ n $ \le $ 50, then the ordered pair (Sn-4, an–4) is equal to:

Question

Let a₁, a₂, ..., an be a given A.P. whose
common difference is an integer and
S_n = a₁ + a₂ + .... + a_n. If a₁ = 1, a_n = 300 and 15 $ \le $ n $ \le $ 50, then
the ordered pair (S_n-4, a_n–4) is equal to:

(2480, 249)