If \(E(X) = 4\) and \(X\) follows Poisson's distribution then \(V(X) =\) ____.

Q.4 (A)(v) If \(E(X) = 4\) and \(X\) follows Poisson's distribution then \(V(X) =\) ____.

A. 2

B. −2

C. 4

D. −4

Doubtly Asked 29 Oct 2026 Board exam · July 2024 hsc 12th Save WhatsApp Report

1 answer

Best answer

Answer: (c) 4

For a Poisson distribution with parameter \(m\), \(E(X) = V(X) = m\). Since \(E(X) = 4\), \(V(X) = 4\).

Doubtly AI · 29 Oct 2026 AI-verified · Nov 2026 Report

Was this answer helpful?