1. Which of the following mentioned standard Probability density functions is applicable to discrete Random Variables? Rayleigh Distribution O Exponential Distribution Poisson Distribution O Gaussian Distribution O 3. A random variable that assume to be infinite or unaccountably infinite number of values is called ..... Irregular random variable O Continuous random variable O Uncertain random variable O Discrete random variable O 4 5. What is the mean and variance for standard normal distribution? Mean is 0 and variance is 1 O Mean is co and variance is 0 O Mean is 0 and variance is co Mean is 1 and variance is 0 O