JEE Main 2021 Mathematics question
Let X be a random variable with distribution. x: –2, –1, 3, 4, 6 P(X=x): 1/5, a, 1/3, 1/5, b If the mean of X is 2.3 and variance of X of is , then 100 is equal to :
Answer: 781
Let X be a random variable with distribution. x: –2, –1, 3, 4, 6 P(X=x): 1/5, a, 1/3, 1/5, b If the mean of X is 2.3 and variance of X of is , then 100 is equal to :