Standardized tests for certain subjects , given to high school students, are scored on a scale of 1 to 5. Let X represent the score on a randomly selected examThe distribution of scores for one subject's standardized test is given in the table. what is the standard deviation of the distribution?

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.