If p.m.f. of a d.r.v. X is P(X = = \(\frac{\left({ }^{5} \mathrm{C}_{x}\right)}{2^{5}}\), for x = 0, 1, 2, 3, 4, 5 and = 0, otherwise. If a = P(X ≤ 2) and b = P(X ≥ 3), then
A. a < b
B. a > b
C. a = b
D. a + b
Answer:C
If p.m.f. of a d.r.v. X is P(X = = \(\frac{\left({ }^{5} \mathrm{C}_{x}\right)}{2^{5}}\), for x = 0, 1, 2, 3, 4, 5 and = 0, otherwise. If a = P(X ≤ 2) and b = P(X ≥ 3), then
A. a < b B. a > b C. a = b D. a + b