defence exam Indian Coast Guard Assistant Commandant (GD/CPL) 2025 Test Series Mathematics Sequences and Series Arithmetic Progressions
If a variable takes values 0, 1, 2, 3, …, n with frequencies 1, C(n, 1), C(n, 2), C(n, 3),…, C(n, n) respectively, then the arithmetic mean is
1
2n
2
n + 1
3
n
4
\(\frac{{\rm{n}}}{2}\)