-
A.
15k -
B.
20k -
C.
50k -
D.
40k -
E.
45k
Correct Answer: Option C
Explanation
C = a + k
(frac{1}{N}) = c
= (frac{aN + k}{N})
CN = aN + K
30(100) = a(100) + k
3000 = 100a + k…….(i)
60(40) = a(40) + k
2400 = 40a + k…….(ii)
eqn (i) – eqn (ii)
600 = 60a
a = 10
subt. for a in eqn (i) 3000 = 100(10) + K
3000 – 1000 = k
k = 2000
CN = 10N + 2000. when N = 50,
50C = 10(50) + 2000
50C = 500 + 2000
C = (frac{2500}{50})
= 50k