Question

In a B.P., P(X=r) = KP(X=n-r) where K is independent of n and r, then P =

• A. ½
• B. 1/3
• C. ¼
• D. 1/5

Answer 1

Answer: (A)

½

Answer 2

; P + q = 1

$P ^ { 2 r - n } q ^ { n - 2 r }$ = K.

K is independent of r & n when P/q = 1

⇒ q = P = ½