which of the following is the mean and variance of the number of attempts required until a solution is successfully tried? which is a measure of the mean and variance of a number of tries necessary to succeed in a given task? what is the average mean-and-varity of tries necessary until you succeed what is the mean of the test number when trying something out how many times must you try something before it succeeds what is the mean and variance of the number of attempts necessary until I succeed? what is the variance of the number of tries required what is the mean and variance in number of tries required for a question? the mean and variance of the number of tries required to test is called what is the mean and variance of the number of tries required for a test? what is mean and variance what is the mean of the variance what is the mean and variance in number of tries required for testing to be successful how do you calculate the probability of success of a test in a given year? what is the mean of the number of tries necessary to fail? what is the mean and variance of the number of tries necessary for success what is the mean variance of a test what is the variance of the number of tries necessary until I succeed? is the variance of number of times necessary what is the mean variance and variance for success