ProbabilityHard
Question
A fair coin is tossed 99 times. If X is the number of times heads occur, then P (X = r) is maximum when r is
Options
A.49
B.50
C.51
D.none of these
Solution
(p + q)99 r ≤ 
⇒ r ≤ 
⇒ r ≤ 50
Terms 50 or 51 are highest
⇒ r ≤ ⇒ r ≤ 50Terms 50 or 51 are highest
Create a free account to view solution
View Solution FreeMore Probability Questions
A random variable $X$ has Poisson distribution with mean 2. Then $P(X > 1.5)$ equals...A bag contains 6 black and 5 white balls, while the second bag contains 7 black and 4 white balls. Two balls are drawn o...Three numbers are chosen at random without replacement from {1, 2, 3, ..... , 8}. The probability that their minimum is ...Mean and variance of a Binomial variate are in the ratio of 3 : 2. The most probable number of happening of the variable...A pair of dice is thrown. If the two numbers appearing on them are different, the probability that the sum is 6, is-...