Question 1

Rating’s feedback as poor, good and excellent of 5 customers is collected in a shop. If feedback of two more customers are recorded, then choose the correct option(s).\ (Assume initial data was bimodal) *X* contains observations of the bowling speed of a bowler and *Y* contains the observations of the bowling speed of another bowler, and it is noted that each observation of *Y* is 1.5 times each observation of *X*. If the sample variance of *X* is 30, then calculate the sample covariance between *X* and *Y* ? Answer the given subquestions If there are 12 ways to arrange *n* persons at a round table such that two particular person (say, ‘A’ and ‘B’) will sit together, then find the value on *n*.