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- Three Random Variables A,B, and C Have The Following Joint Probability Density Function (PDF) faB,c(a, b, c) = {- abc² -,0Please show all stepsLet X and Y be discrete random variables with joint pdf f(x,y) given by the following table: y = 1 y = 2 y = 3 x = 1 0.1 0.2 0 x = 2 0 0.167 0.4 x = 3 0.067 0.022 0.033 Find the marginal pdf’s of X and Y. Are X and Y independent?Let X-N(2,5). Let f be the density of this random variable. We want to evaluate in R f(6). Which of the following statements are true? The normal distribution N(2, 5) 0.08 - 0.06- 0.04 - 0.02 - 0.00 -10 10 The answer is The R instruction is dnorm(-2,2,5) Can you explain why ? Density f(x)The total number of hours, in units of 100 hours, that a family runs a vacuum cleaner over a period of one year is a random variable X having the density function shown to the right. Find the variance of X (x-8). f(x)2-(X-8). 9sx< 10, 8umple 27: If a random variable has the probability density function k(x? – 1),-1Recommended textbooks for youA First Course in Probability (10th Edition)ProbabilityISBN:9780134753119Author:Sheldon RossPublisher:PEARSONA First Course in Probability (10th Edition)ProbabilityISBN:9780134753119Author:Sheldon RossPublisher:PEARSON