Question

Let X – B (n = 7, p = 0.5). Then P(X = 2) is ______.

पर्याय

• 0.2641

• 0.1641

• 0.1177

• 0.2177

Answer 1

Let X – B (n = 7, p = 0.5). Then P(X = 2) is 0.1641.

Explanation:

P(X = 2) = ⁷C₂ (0.5)² (0.5)⁵ = 0.1641