An instructor has given a short quiz consisting of two parts. For a randomly selected student, letX= the number of points earned on the first part andY= the number of points earned on the second part. Suppose that the joint pmf ofXandYis given in the accompanying table. (Give answers accurate to 2 decimal places.)

An Instructor has given a short quiz consisting of two parts . For a randomly selected student , let * = the number of points earned on the first part and Y = the number of points earned on the second part . Suppose that the joint pint of * and Y' is given in the accompanying table . ( Give answers accurate to 2 decimal places . ) P ( x, V ) O 5 10 15 O 0. 01 0. 06 0. 02 0. 10 X 5 0. 04 0. 13 0. 20 0. 10 10 0. 01 0. 15 0. 17 0. 01 ( a ) Compute the covariance for X and Y . ( b) Compute p for X and Y