ProbabilityHard
Question
The mean and the variance of a binomial distribution are 4 and 2 respectively. Then the probability of 2 successes is
Options
A.
B.
C.
D.
Solution
Given that n p = 4, n p q = 2 ⇒ q = 1/2 ⇒ p = 1/2 , n = 8 ⇒ p(x = 2) = 8C2 
Create a free account to view solution
View Solution FreeMore Probability Questions
P (A + B) means-...If a, b and c are three numbers (not necessarily different) chosen randomly and with replacement from the set {1, 2, 3, ...Box-I contains 5 red and 4 blue balls while box-II contains 4 red and 2 blue balls. A fair die is thrown. If it turns up...The probability of getting a number chosen from 1, 2,.....100 as cube is-...A coin is tossed three times. The probability that in the second toss head does not occur, is-...