Given that, mean = 21 and median = 22
Using the relation,
Mode = 3 median – 2 mean
\(\implies\) Mode = 3(22) – 2(21)
= 66 – 42 = 24
The mean and variance of a random variable X having a binomial distribution are 4 and 2 respectively, then P(X = 1) is
Find the variance of first n even natural numbers ?
The mean and the variance of a binomial distribution are 4 and 2, respectively. Then, the probability of 2 success is
In a series of 2n observations, half of them equals a and remaining half equal -a. If the standard deviation of the observation is 2, then |a| equal to
The mean of the numbers a, b, 8, 5, 10 is 6 and the variance is 6.80. Then, find the values of a and b?