Mrs. Jeanson collects rocks. She has 100 rocks, one fourth blue, two fifth red, one tenth green, and the rest are multicolored. How many more red than blue?

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%